Display device including digitizer

• US 10,019,114 B2
• Filed: 06/11/2015
• Issued: 07/10/2018
• Est. Priority Date: 09/25/2014
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Byun, Sang Chul, Nam, Seok Hyun, Park, Se Ki, Son, Young Hye, Lee, Sang Hyuk
• Primary Examiner(s): Shen, Yuzhen
• Application Number:
  US14/736,622
• Publication Number:
  US 20160092030A1
• Time in Patent Office: 1,125 Days
• Field of Search: 345175
• CPC Class Codes: G02B 6/0018 Redirecting means on the surface of the light guide
• CPC Class Codes: G02B 6/0031 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0051 Diffusing sheet or layer
• CPC Class Codes: G02B 6/0055 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0065 Manufacturing aspects; Material aspects
• CPC Class Codes: G02B 6/0073 Light emitting diode [LED]
• CPC Class Codes: G02B 6/0083 Details of electrical connections of light sources to drivers, circuit boards, or the like
• CPC Class Codes: G02B 6/0085 Means for removing heat created by the light source from the package heat extraction or cooling elements for semiconductor light sources in general H01L33/64
• CPC Class Codes: G02B 6/0091 of the light source relative to the light guide G02B6/0021 takes precedence
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0421 by interrupting or reflecting a light beam, e.g. optical touch-screen
• CPC Class Codes: G06F 3/046 by electromagnetic means

Abstract

A display device may include a display panel, at least one light source disposed on one side of the display panel, a circuit board to drive the light source, a light guide plate in which light emitted from the light source is incident into a surface and is emitted to another surface, and a lower frame to support the display panel and to accommodate the light source and the light guide plate. The lower frame may include a base substrate, a digitizer disposed on the base substrate, and a dummy digitizer pattern disposed on the base substrate and spaced apart from the digitizer. The circuit board may be disposed between the digitizer and the dummy digitizer pattern, and the lower frame may be bent and extend around the light source.

Claims

1. A display device comprising:

a display panel;

at least one light source disposed on one side of the display panel;

a circuit board to drive the light source;

a light guide plate, light emitted from the light source being incident into a surface of the light guide plate and being emitted to another surface of the light guide plate; and

a lower frame to support the display panel and to accommodate the light source and the light guide plate, the lower frame comprising;

a base substrate;

a digitizer disposed on the base substrate; and

a dummy digitizer pattern disposed on the base substrate, the dummy digitizer pattern being spaced apart from the digitizer, the circuit board disposed between the digitizer and the dummy digitizer pattern, the lower frame being bent and extending around the light source.

2. The display device of claim 1, wherein the lower frame further comprises a reflective sheet disposed on the digitizer and dummy digitizer pattern.

3. The display device of claim 2, wherein the reflective sheet is bent and extends around the light source.

4. The display device of claim 2, wherein the circuit board has a thickness that is smaller than or equal to a total thickness of the digitizer and reflective sheet.

5. The display device of claim 1, wherein the dummy digitizer pattern is bent and extends around the light source.

6. The display device of claim 5, wherein:

the reflective sheet is bent and extends around the light source; and

the circuit board has a thickness that is smaller than or equal to a total thickness of the digitizer and reflective sheet.

7. The display device of claim 6, wherein the digitizer comprises:

a first substrate comprising a first wire to induce an electromagnetic field; and

a second substrate facing the first substrate, the second substrate comprising a second wire extending at a predetermined angle with respect to the first wire.

8. The display device of claim 1, wherein the digitizer comprises:

a first substrate comprising a first wire to induce an electromagnetic field; and

a second substrate facing the first substrate, the second substrate comprising a second wire extending at a predetermined angle with respect to the first wire.

9. The display device of claim 1, wherein the base substrate comprises at least one selected from the group consisting of aluminum (Al), magnesium (Mg), and non-magnetic steel use stainless (SUS).

10. The display device of claim 1, wherein the light source comprises at least one of one or more LED chips and a package accommodating the one or more LED chips.

11. The display device of claim 1, wherein the circuit board comprises at least one of a printed circuit board (PCB) and a metal core PCB.

12. A display device comprising:

a display panel;

at least one light source disposed on one side of the display panel;

a circuit board to drive the light source;

a light guide plate, light emitted from the light source being incident into a surface of the light guide plate and being emitted to another surface of the light guide plate;

a supporter surrounding the light source and supporting the display panel;

a lower frame to accommodate the light source, the light guide plate, and the supporter, the lower frame comprising;

a base substrate; and

a digitizer disposed on the base substrate; and

a dummy digitizer pattern spaced apart from the digitizer and disposed on the base substrate, the circuit board being disposed between the digitizer and the dummy digitizer pattern.

13. The display device of claim 12, wherein the lower frame further comprises a reflective sheet disposed on the digitizer and dummy digitizer pattern.

14. The display device of claim 13, wherein the circuit board has a thickness that is smaller than or equal to a total thickness of the digitizer and reflective sheet.

15. The display device of claim 12, further comprising a reflective member disposed on a rear surface of the supporter.

16. The display device of claim 12, wherein the digitizer comprises:

a first substrate comprising a first wire to induce an electromagnetic field; and

a second substrate facing the first substrate, the second substrate comprising a second wire extending at a predetermined angle with respect to the first wire.

17. The display device of claim 12, wherein the base substrate comprises at least one selected from the group consisting of aluminum (Al), an aluminum alloy, magnesium (Mg), a magnesium alloy, and non-magnetic steel use stainless (SUS).

18. The display device of claim 12, wherein the light source comprises at least one of one or more LED chips and a package accommodating the one or more LED chips.

19. The display device of claim 12, wherein the circuit board comprises at least one of a printed circuit board (PCB) and a metal core PCB.