AI Patent Summary

Patent Document
#US5874931A
United States Patent 115
Abstract
A single semiconductor chip device is utilized for control- ling an external system which has a liquid crystal display (LCD) associated therewith. A dual port random access memory (RAM) stores data representative of information to be displayed on the LCD. The RAM includes a plurality of master data storage latches and a single slave data storage latch shared by all of the plurality of master storage latches. A microcontroller has a central processing unit (CPU) for communicating with the master storage latches via one of the RAM ports to periodically change the data stored therein. An LCD control module successively updates the data in the single slave storage latch with data from each of the master storage latches and downloads the updated data from the single slave storage latch to a temporary store associated with the LCD after each update from a master storage latch and before the update of data from the next master storage latch. Consequently, data in cach master storage latch may be changed periodically by the CPU without interference with downloading of updated data from the single slave storage unit.
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Patent Classification & AI Product Mapping
Authoritative patent classification definitions mapped to real-world technology domains and commercial product categories.
CPC G09G3/00
Confidence: High
Official Definition
Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
PHYSICS > EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS > ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
AI Technology & Product Mapping
Technology Domain:
Display Drivers & Control Systems
Product Category:
LCD Controller Integrated Circuits
Plain-English Summary:
Circuitry and control systems designed specifically for driving and managing non-CRT display screens, such as flat-panel displays.
Relation to Claims:
The patent involves a single-chip device with an LCD control module that manages data downloading to an LCD temporary store, matching the general scope of non-CRT visual indicator control.
CPC G09G3/20
Confidence: High
Official Definition
Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
PHYSICS > EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS > ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
AI Technology & Product Mapping
Technology Domain:
Matrix Display Driving Technology
Product Category:
Dot-Matrix LCD Controllers
Plain-English Summary:
Circuits for controlling matrix-based displays (like dot-matrix screens) to show text or graphics without relying on traditional cathode-ray tube raster scanning.
Relation to Claims:
The patent abstract discusses a dual-port RAM storing data for an LCD using master storage latches and an LCD control module, which corresponds to driving elements in a display matrix.
CPC G09G3/34
Confidence: High
Official Definition
Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
PHYSICS > EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS > ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
AI Technology & Product Mapping
Technology Domain:
Light-Modulating Display Control
Product Category:
Passive-Matrix and Backlit LCD Controllers
Plain-English Summary:
Circuits for controlling displays that modulate light from an external or independent light source rather than emitting their own light.
Relation to Claims:
Applies directly to the control of liquid crystal displays which function by modulating light from an external source.
CPC G09G3/36
Confidence: High
Official Definition
Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
PHYSICS > EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS > ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
AI Technology & Product Mapping
Technology Domain:
LCD Controller Architecture
Product Category:
LCD Driver ICs & Microcontrollers with Integrated Display Drivers
Plain-English Summary:
Specialized electronic control circuits specifically built for operating Liquid Crystal Displays (LCDs) using matrix arrangements.
Relation to Claims:
The invention explicitly features a semiconductor device for controlling an external system with an LCD, utilizing a dual-port RAM and an LCD control module to update display data.
CPC G06F3/00
Confidence: Medium
Official Definition
Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
PHYSICS > COMPUTING OR CALCULATING; COUNTING > ELECTRIC DIGITAL DATA PROCESSING
AI Technology & Product Mapping
Technology Domain:
Microcontroller Peripheral Interfaces
Product Category:
Embedded Microcontrollers & SoC Peripherals
Plain-English Summary:
General input/output (I/O) interface arrangements and peripheral communication mechanisms used by computers and microcontrollers to interact with external devices.
Relation to Claims:
The patent describes a CPU communicating with dual-port RAM master storage latches to change display data, representing an internal/external output data transfer and interface mechanism.