Semiconductor Touch Display Controller With Internal Memory

Solution Overview

Problem

The inefficiency in controlling touch panel controllers and display drivers in portable terminals, where external host processors bear a significant load, leading to increased power consumption and reliability issues due to the need for external control.

Innovation Solution

A semiconductor device with a touch panel controller, a processor, and a display driver, where the processor stores and accesses control data from a memory circuit to autonomously control both the touch panel and display panel, reducing the load on external processors and enabling efficient internal control.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the host processor controls the touch panel controller and display driver from outside, then the control function is achieved, but the control load on the host processor increases and power consumption increases

Engineering Contradiction:

Improvecontrol functionVSAvoidpower consumption

Core Design Contradiction:

Ease of operationVSUse of energy by moving object

Solution Approach 1:

The semiconductor device performs self-control by having its internal processor access control data from the memory circuit to autonomously control the touch panel controller and display driver, eliminating the need for continuous external control signals from the host processor and thereby reducing power consumption

Inventive Principle:

Principle #25Self-service

2Ease of operation

If the host processor controls the touch panel controller and display driver from outside, then the control function is achieved, but the control load on the host processor increases

Engineering Contradiction:

Improvecontrol functionVSAvoidcontrol load

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The semiconductor device performs self-control by having its internal processor access control data from the memory circuit to autonomously control the touch panel controller and display driver, eliminating the need for continuous external control signals from the host processor and thereby reducing power consumption

Inventive Principle:

Principle #25Self-service

3Adaptability or versatility

If external control is used for touch panel and display driver, then control flexibility is maintained, but reliability decreases due to external intervention

Engineering Contradiction:

Improvecontrol flexibilityVSAvoiddetecting action reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The semiconductor device performs self-control by having its internal processor access control data from the memory circuit to autonomously control the touch panel controller and display driver, eliminating the need for continuous external control signals from the host processor and thereby reducing power consumption

Inventive Principle:

Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This arrangement lightens the control load on external processors, eliminates inefficiencies, and promotes autonomous control, reducing power consumption and improving reliability by allowing internal control of touch panel and display drivers without external intervention.

Implementation Method 1

The display driver has a memory circuit which rewritably stores control data for drive control of a display panel from outside the semiconductor device

Methodology Applied

Scientific EffectMemory storage:

Implementation Method 2

In a touch panel supporting a multipoint touch according to a mutual capacitance technique, for example, drive electrodes and detection electrodes are arranged to intersect with each other at e.g. right angles with dielectric interposed therebetween; the cross-coupling capacitance of each intersection of the drive and detection electrodes makes a node capacitance

Methodology Applied

Scientific EffectMutual capacitance: Capacitance

Data Source

PatentUS9778725B2Semiconductor device and electronic device

Publication Date: 2017.10.03 OMNIVISION TDDI ONTARIO LLP

AI summary

The semiconductor device has a touch panel controller, a processor, and a display driver. The display driver has a memory circuit which rewritably stores control data for drive control of a display panel from outside the semiconductor device. The processor controls the touch panel controller based on a command provided from outside the semiconductor device, and accesses control data in the memory circuit for controlling internal parts of the semiconductor device. With the aid of the arrangement like this, the processor is allowed to control a touch panel based on the read control data fit to the control by the display driver, and to control, by writing control data, the display panel fit for a control condition of the touch panel.