Display apparatus

• US 10,217,403 B2
• Filed: 05/16/2017
• Issued: 02/26/2019
• Est. Priority Date: 05/20/2016
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: Lin, Chun-Hsien, Hsieh, Chih-Yung, Hsieh, Tsau-Hua, Kuo, Shu-Ming
• Primary Examiner(s): Ahmed, Selim
• Application Number:
  US15/597,149
• Publication Number:
  US 20170337870A1
• Time in Patent Office: 651 Days
• Field of Search: 257 98, 257 99
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2300/0456 with a reflective area and a transmissive area combined in one pixel, such as in transflectance pixels
• CPC Class Codes: G09G 2300/0809 Several active elements per pixel in active matrix panels
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H01L 33/42 Transparent 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 disclosure provides a display apparatus. The display apparatus of the disclosure includes a substrate having a plurality of pixel regions, a plurality of active elements, a plurality of first signal lines and second signal lines, a plurality of ground signal lines and a plurality of light emitting diodes (LEDs). The plurality of ground signal lines are disposed on the substrate and arranged to alternate with the first signal lines. At least one LED has first and second electrodes. The first electrode of at least one LED is electrically connected with a corresponding active element. A second electrode of at least one LED is electrically connected with a corresponding ground signal line. At least two LEDs disposed in an identical pixel region is electrically connected with an identical ground signal line between two first signal lines adjacent to each other. The display apparatus of the disclosure has high resolution.

Claims

1. A display apparatus, comprising:

a substrate, comprising a plurality of sub-pixel regions and a plurality of reflective structures disposed in the plurality of sub-pixel regions;

a plurality of LEDs, disposed on the plurality of sub-pixel regions and electrically connected with the substrate;

a first insulation layer, disposed between the plurality of LEDs; and

an anti-reflection conductive layer, disposed on the first insulation layer, wherein a reflectivity of the anti-reflection conductive layer is lower than a reflectivity of at least one of the reflective structures, the anti-reflection conductive layer blocks the plurality of reflective structures of the substrate and comprises a plurality of openings, the plurality of openings expose a corresponding light emitting region of the LED.

2. The display apparatus according to claim 1, wherein at least one of the LEDs comprises:

a first semiconductor layer;

a second semiconductor layer;

a light emitting layer, disposed between the first semiconductor layer and the second semiconductor layer and defining a light emitting region of at least one of the LEDs; and

a transparent electrode, electrically connected with the second semiconductor layer, wherein a plurality of first semiconductor layers of the plurality of LEDs are connected with the substrate, and a plurality of transparent electrodes of the plurality of LEDs are electrically connected with each other via the anti-reflection conductive layer.

3. The display apparatus according to claim 1, wherein at least one of the LEDs comprises:

a first semiconductor layer;

a second semiconductor layer;

a light emitting layer, disposed between the first semiconductor layer and the second semiconductor layer and located in a light emitting region of the LED; and

a transparent electrode, electrically connected with the second semiconductor layer, wherein a plurality of first semiconductor layer of the plurality of LEDs are connected with the substrate, and the display apparatus further comprises;

a transparent conductive layer, disposed on the first insulation layer, cover the plurality of sub-pixel regions and electrically connected with the plurality of transparent electrodes of the plurality of LEDs.

4. The display apparatus according to claim 3, wherein the plurality of openings of the anti-reflection conductive layer expose the plurality of transparent electrodes of the plurality of LEDs, the transparent conductive layer covers the anti-reflection conductive layer and is filled in the plurality of openings of the anti-reflection conductive layer to be electrically connected with the plurality of transparent electrodes of the plurality of LEDs.

5. The display apparatus according to claim 3, wherein the transparent conductive layer covers the first insulation layer and the plurality of transparent electrodes of the plurality of LEDs, and the anti-reflection conductive layer is disposed on the transparent conductive layer.

6. The display apparatus according to claim 1, wherein at least one of the LEDs comprises a light emitting layer, the light emitting layer has a width in a direction, and an opening of the anti-reflection conductive layer corresponding to the light emitting layer has a width in the one direction, and the width of the opening is greater than a half of the width of the light emitting layer.

7. The display apparatus according to claim 6, wherein the width of the light emitting layer is between 0.5 μ

m to 500 μ

m.

8. The display apparatus according to claim 1, wherein the substrate comprises:

a plurality of active elements, disposed in the plurality of sub-pixel regions and electrically connected with the plurality of LEDs; and

a plurality of capacitor electrodes, electrically connected with the plurality of active elements respectively, wherein the plurality of reflective structures comprise the plurality of capacitor electrodes, the anti-reflection conductive layer blocks at least a portion of a region of the plurality of capacitor electrodes outside the plurality of LEDs.

9. The display apparatus according to claim 1, wherein the anti-reflection conductive layer is a stacked layer comprising at least two of chromium, chromium nitride and chromium oxide or a stacked layer comprising aluminum alloy and AlX—

N, and the AlX—

N is aluminum nitride or aluminum alloy nitride.