DISPLAY APPARATUS USING SEMICONDUCTOR LIGHT EMITTING DEVICE

• US 20160313848A1
• Filed: 10/30/2014
• Published: 10/27/2016
• Est. Priority Date: 11/18/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: RHEE, Byungjoon
• Granted Patent: US 9,846,510 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02B 5/201 in the form of arrays
• CPC Class Codes: G06F 1/1652 the display being flexible, e.g. mimicking a sheet of paper, or rollable
• CPC Class Codes: G06F 2203/04101 2.5D-digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup
• CPC Class Codes: G06F 2203/04102 Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: H01L 2224/83192 wherein the layer connectors are disposed only on another item or body to be connected to the semiconductor or solid-state body
• CPC Class Codes: H01L 2224/95 at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 33/32 containing nitrogen
• CPC Class Codes: H01L 33/42 Transparent materials
• CPC Class Codes: H01L 33/502 Wavelength conversion materials
• CPC Class Codes: H01L 33/58 Optical field-shaping elements
• CPC Class Codes: H01L 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls

Abstract

The present invention relates to a display apparatus and, more particularly, to a display apparatus using a semiconductor light emitting device. In the display apparatus including a touch sensor unit and a display unit controlled based on a touch input sensed through the touch sensor unit, the display unit includes: a conductive bonding layer; and a plurality of semiconductor light emitting devices bonded to the conductive bonding layer and arranged to form a plurality of rows, and the touch sensor unit includes: an X electrode disposed between the plurality of rows of the semiconductor light emitting devices in the display unit; and an Y electrode configured to be combined with the X electrode to sense a touch input.

Claims

1. A display apparatus including a touch sensor unit and a display unit controlled based on a touch input sensed through the touch sensor unit, wherein the display unit comprises:

a conductive bonding layer; and

a plurality of semiconductor light emitting devices combined with the conductive bonding layer and arranged to form a plurality of rows, and

the touch sensor unit comprises;

an X electrode disposed between the plurality of rows of the plurality of semiconductor light emitting devices in the display unit;

an Y electrode configured to be combined with the X electrode to sense a touch input, a plurality of horizontal electrode lines electrically connected to the plurality of semiconductor light emitting devices; and

a plurality of vertical electrode lines arranged in a direction crossing the plurality of horizontal electrode lines and disposed to be parallel to the X electrode.

2. The display apparatus of claim 1, further comprising:

a black matrix disposed to cover the X electrode between the plurality of semiconductor light emitting devices.

3. The display apparatus of claim 2, wherein phosphor layers are formed on one surfaces of the plurality of semiconductor light emitting devices, and the black matrix and the X electrode are positioned between the phosphor layers, respectively.

4. The display apparatus of claim 2, wherein the X electrode is disposed between the conductive bonding layer and the black matrix.

5. The display apparatus of claim 2, wherein the X electrode and the black matrix are formed of materials having different resistance values, respectively.

6. The display apparatus of claim 1, wherein the X electrode is formed as being black to alleviate reflection between the phosphor layers provided in the display unit.

7. The display apparatus of claim 6, wherein the X electrode is formed as a single layer between the phosphor layers.

8. The display apparatus of claim 1, wherein the X electrode is disposed inside the display unit, the Y electrode is formed on an electrode film formed of a light-transmissive material allowing light emitted from the plurality of semiconductor light emitting devices to be transmitted therethrough, and the electrode film is disposed to overlap the plurality of semiconductor light emitting devices outside the display unit.

9. The display apparatus of claim 8, wherein a light-transmissive member is disposed between the electrode film and the plurality of semiconductor light emitting devices to space the X and Y electrodes and allow light from the semiconductor light emitting devices to be transmitted therethrough.

11. The display apparatus of claim 1, wherein the plurality of horizontal electrode lines and the plurality of vertical electrode lines are formed on a wiring board covered by the conductive bonding layer.

12. The display apparatus of claim 1, wherein the display unit comprises a vertical electrode and a horizontal electrode electrically connected to the plurality of semiconductor light emitting devices and arranged in mutually crossing directions, and any one of the vertical electrode and the horizontal electrode has a potential difference from the X electrode such that the any one of the vertical electrode and the horizontal electrode becomes a Y electrode of the touch sensor unit.

13. The display apparatus of claim 12, wherein the touch sensor unit senses a touch input through a signal transmission line formed between any one of the vertical electrode and the horizontal electrode and the X electrode.

10. (canceled)

14. A display apparatus comprising:

first and second electrodes;

a conductive bonding layer electrically connected to at least one of the first and second electrodes;

a semiconductor light emitting device combined with the conductive bonding layer;

a third electrode configured to form a potential difference with any one of the first and second electrodes to sense a touch input; and

a controller configured to control the semiconductor light emitting device through a first signal transmission line formed by the first and second electrodes and process a touch input sensed through a second signal transmission line formed by any one of the first and second electrodes and the third electrode.

15. The display apparatus of claim 14, wherein a driving signal of the semiconductor light emitting device is generated due to a first potential difference formed between the first and second electrodes, and a second potential difference formed between the any one of the first and second electrodes and the third electrode to sense a touch input is greater than the first potential difference.

16. The display apparatus of claim 15, wherein an influence of the generated first potential difference on the second potential difference is processed as noise in sensing the touch input.

17. The display apparatus of claim 14, wherein magnitudes of voltages applied to any one of the first and second electrode and the other are smaller than a magnitude of a voltage applied to the third electrode.

18. The display apparatus of claim 14, wherein the semiconductor light emitting device is turned on based on a potential difference between the first and second electrodes formed as a potential of any one of the first and second electrodes is changed, and a potential of the third electrode is changed in response to the change in the potential of any one of the first and second electrodes to maintain the potential difference for sensing a touch input.

19. The display apparatus of claim 18, wherein the change in the potential of any one of the first and second electrodes and the change in the potential of the third electrode are generated in the form of a pulse, respectively, and the potentials are changed at the same point in time and with the same magnitude.

20. The display apparatus of claim 14, wherein the third electrode is formed on an electrode film formed of a light-transmissive material allowing light emitted from the semiconductor light emitting device to be transmitted therethrough, and the electrode film is disposed to overlap the semiconductor light emitting device.

21. The display apparatus of claim 14, wherein the third electrode is disposed between a plurality of semiconductor light emitting devices arranged to form a plurality of rows and combined with any one of the first and second electrodes to sense a touch input.