High screen ratio display device with fingerprint identification

• US 10,409,099 B2
• Filed: 08/24/2017
• Issued: 09/10/2019
• Est. Priority Date: 07/03/2017
• Status: Active Grant

• Current Assignee: FocalTech Systems Co.,Ltd
• Original Assignee: FocalTech Systems Co.,Ltd
• Inventors: Hsiao, Pei-Hung
• Primary Examiner(s): Soto Lopez, Jose R
• Application Number:
  US15/685,691
• Publication Number:
  US 20190004354A1
• Time in Patent Office: 747 Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 2203/04105 Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
• CPC Class Codes: G06V 40/1318 using electro-optical elements or layers, e.g. electroluminescent sensing
• CPC Class Codes: G06V 40/1329 Protecting the fingerprint sensor against damage caused by the finger
• CPC Class Codes: G06V 40/1365 Matching; Classification
• CPC Class Codes: H10K 59/123 Connection of the pixel electrodes to the thin film transistors [TFT]

Abstract

A high screen ratio display device with fingerprint identification includes a lower substrate, an upper substrate, and a cover glass. The lower substrate has a thin film transistor array formed with a plurality of thin film transistors and corresponding capacitors to provide an active area. The upper substrate is disposed on one side of the TFT array, and has an optical film layer. The cover glass is disposed on one side of the upper substrate, and has an opening to accommodate a fingerprint identification module. The opening at least partially overlaps the active area, and a space is defined between the opening of the cover glass and the thin film transistor array to accommodate a portion of the fingerprint identification module.

Claims

1. A high screen ratio display device with fingerprint identification, comprising:

a lower substrate having a thin film transistor array formed with a plurality of thin film transistors and corresponding capacitors to provide an active area;

an upper substrate disposed on one side of the thin film transistor array and having an optical film layer; and

a cover glass disposed on one side of the upper substrate and having an opening to accommodate a fingerprint identification module,

wherein the opening at least partially overlaps the active area, and a space is defined between the opening and the thin film transistor array to accommodate a portion of the fingerprint identification module,

wherein the thin film transistor array has a plurality of sensing electrodes disposed corresponding to the opening for sensing a change of the space resulting from the fingerprint identification module being pressed based on a self-capacitance sensing technique.

2. The high screen ratio display device with fingerprint identification as claimed in claim 1, wherein the optical film layer includes an optical clear adhesive layer and a polarizer layer.

3. The high screen ratio display device with fingerprint identification as claimed in claim 2, wherein the optical clear adhesive layer has a gap corresponding to the opening to define the space.

4. The high screen ratio display device with fingerprint identification as claimed in claim 2, wherein the polarizer layer has a gap corresponding to the opening to define the space.

5. The high screen ratio display device with fingerprint identification as claimed in claim 3, wherein the polarizer layer has a gap corresponding to the opening to define the space.

6. The high screen ratio display device with fingerprint identification as claimed in claim 3, wherein the optical film layer further includes a pad material layer having a gap corresponding to the opening to define the space.

7. The high screen ratio display device with fingerprint identification as claimed in claim 2, wherein the optical clear adhesive layer includes a fully coated optical glue layer or a partially coated optical glue layer comprising a mouth or hollow-square shape.

8. The high screen ratio display device with fingerprint identification as claimed in claim 4, further comprising:

a color filter layer having a gap corresponding to the opening to define the space.

9. The high screen ratio display device with fingerprint identification as claimed in claim 1, wherein a display driving and touch detection integrated circuit is formed on the thin film transistor array.

10. The high screen ratio display device with fingerprint identification as claimed in claim 9, wherein the display drive and the touch detection integrated circuit is electrically connected to the thin film transistor array by chip on glass (COG) or chip on film (COF) technique.

11. The high screen ratio display device with fingerprint identification as claimed in claim 1, wherein the high screen ratio display device has a screen ratio greater than a ratio of 16 to 9.

12. The high screen ratio display device with fingerprint identification as claimed in claim 1, wherein the fingerprint identification module covers at least a portion of the active area.