Circuit configuration of a touch panel controller IC

Patent metadata

Field	Value
Publication number	US-9619058-B2
Application number	US-201414581174-A
Country	US
Kind code	B2
Filing date	Dec 23, 2014
Priority date	Dec 31, 2013
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

A circuit configuration for touch panel controller IC includes a substrate including electrode pins arranged along four border edges thereof for signal transmission, and a controller mounted on the substrate and surrounded by the electrode pins and including processing units arranged in one same direction in a parallel manner, electric contacts arranged in three rows at three sides around the processing units and respectively electrically connected to the electrode pins of the substrate by respective lead wires and steering wires respectively electrically connected between the processing units and the electric contacts. Arranging the processing units in one same direction in a parallel manner minimizes differences in environmental conditions in exposure graphic definition and etch rate, thereby obtaining better circuit component process uniformity, and thus, the variation among the processing units after fabrication can be insignificant and better sensing accuracy can be achieved.

First claim

What the invention claimed is:

1. A circuit configuration for touch panel controller integrated circuit (“IC”), comprising:
a substrate comprising a plurality of electrode pins arranged along opposing front and rear border edges and opposing left and right border edges thereof for signal transmission, and a plurality of lead wires respectively extended from said electrode pins toward a center part of said substrate; and
a controller mounted on said substrate and surrounded by said electrode pins, said controller comprising a plurality of processing units, all of the plurality of processing units being arranged in a single direction in a parallel manner in the form of a rectangular array that defines opposing front and rear sides and opposing left and right sides corresponding to the opposing front and rear border edges and opposing left and right border edges of said substrate, a plurality of electric contacts respectively electrically connected with the respective opposite ends of the lead wires that are respectively connected to the electrode pins at the front, left and right border edges of said substrate, and a plurality of steering lead wires respectively electrically connected between said processing units and said electric contacts, the plurality of electric contacts including first to third parts that are respectively arranged along the front, left and right sides around said processing units,
wherein the pitch of the first part of the plurality of electric contacts is larger than pitch of said processing units.

2. The circuit configuration for touch panel controller IC as claimed in claim 1 , wherein said controller further comprises a plurality of first input/output units respectively electrically connected between said processing units and said steering lead wires, said first input/output units being arranged in the same direction in a parallel manner relative to said processing units.

3. The circuit configuration for touch panel controller IC as claimed in claim 2 , wherein the pitch of said first input/output units is approximately equal to the pitch of said processing units.

4. The circuit configuration for touch panel controller IC as claimed in claim 1 , wherein said controller further comprises a plurality of first input/output units respectively electrically connected between said electric contacts and said steering lead wires, said first input/output units being arranged in three rows respectively disposed in parallel to the three rows of said electric contacts.

5. The circuit configuration for touch panel controller IC as claimed in claim 4 , wherein the pitch of said first input/output units is larger than the pitch of said processing units.

6. The circuit configuration for touch panel controller IC as claimed in claim 1 , wherein each said processing unit comprises therein an analog-to-digital converter adapted for converting an external touch panel analog sensing signal into a digital signal.

7. The circuit configuration for touch panel controller IC as claimed in claim 6 , wherein each said processing unit further comprises therein a current-to-voltage converter electrically connected between said analog-to-digital converter and one said electric contact and adapted for converting a current signal into a voltage signal.

8. The circuit configuration for touch panel controller IC as claimed in claim 1 , wherein said controller further comprises a digital processing unit disposed a rear side relative to said processing units and electrically connected with said processing units, a plurality of second electric contacts arranged in a row along a rear side of said digital processing unit opposite to said processing units and respectively connected with the respective opposite ends of the lead wires that are respectively connected to the electrode pins at the rear border edge of said substrate, and a plurality of second input/output units respectively electrically connected between said digital processing unit and said second electric contacts.

9. The circuit configuration for touch panel controller IC as claimed in claim 1 , wherein
a first half of the first part of the plurality of electric contacts is arranged adjacent to the second part of the plurality of electric contacts,
a second half of the first part of the plurality of electric contacts is arranged adjacent to the third part of the plurality of electric contacts,
a number of the electric contacts in the first half of the first part of the plurality of electric contacts and a number of the electric contacts in the second part of the plurality of electric contacts are equal to a half of a number of the processing units,
a number of the electric contacts in the second half of the first part of the plurality of electric contacts and a number of the electric contacts in the third part of the plurality of electric contacts are equal to the half of the number of the processing units, and
the number of the electric contacts in the second part of the plurality of electric contacts is equal to the number of the electric contacts in the third part of the plurality of electric contacts.

10. The circuit configuration for touch panel controller IC as claimed in claim 1 , wherein
numbers of the electric contacts in the first to third parts of the plurality of electric contacts are equal to numbers of electrode pins of the substrate arranged on respective sides of the substrate.

Assignees

• Egalax_Empia Tech Inc

Inventors

• Lin Po-Chuan

Classifications

• H10W90/756

  between a chip and a stacked lead frame, conducting package substrate or heat sink · CPC title

• H10W72/5449

  not being orthogonal to a side surface of the chip, e.g. fan-out arrangements · CPC title

• H10W72/932

  Plan-view shape, i.e. in top view · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title