Server-Preprocessed PDF Margin Trimming for Portable Terminals

Solution Overview

Problem

Conventional methods for displaying PDF files on portable terminals with small displays are inefficient due to the need for real-time detection and trimming of varying page margins, which consumes significant resources and slows down page switching.

Innovation Solution

A method where a terminal sends a file specification to a server, which generates and sends a data package containing margin trimming data, allowing the terminal to display the file with trimmed page margins without the need for real-time detection, thus conserving resources and improving efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If the terminal performs real-time detection and trimming of page margins, then the text display area is enlarged, but the resource consumption increases and page switching speed decreases

Engineering Contradiction:

Improvetext display areaVSAvoidpage switching speed

Core Design Contradiction:

Area of stationary objectVSProductivity

Solution Approach 1:

The patent applies preliminary action by pre-calculating and storing margin trimming data on the server before the terminal needs to display the PDF file. When a user requests to view a PDF, the terminal retrieves the pre-computed margin trimming data from the server, avoiding the need to perform real-time detection and trimming operations on the portable terminal. This significantly reduces resource consumption and accelerates page switching while still achieving the goal of enlarging the text display area.

Inventive Principle:

Principle #10Preliminary action

2Area of stationary object

If the terminal performs real-time detection and trimming of page margins, then the text display area is enlarged, but the resource consumption increases

Engineering Contradiction:

Improvetext display areaVSAvoidcomputational resource consumption

Core Design Contradiction:

Area of stationary objectVSUse of energy by moving object

Solution Approach 1:

The patent introduces a server as an intermediary between the user and the PDF file processing. The server performs the computationally intensive tasks of detecting text portions and calculating margin trimming data, then stores these results. The terminal acts as a lightweight client that only needs to retrieve and apply the pre-computed data, dramatically reducing its resource consumption and energy usage while still achieving enlarged text display area.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Area of stationary object

If the terminal performs real-time detection and trimming of page margins, then the text display area is enlarged, but the operation complexity increases

Engineering Contradiction:

Improvetext display areaVSAvoidprocessing operation complexity

Core Design Contradiction:

Area of stationary objectVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-calculating and storing margin trimming data on the server before the terminal needs to display the PDF file. When a user requests to view a PDF, the terminal retrieves the pre-computed margin trimming data from the server, avoiding the need to perform real-time detection and trimming operations on the portable terminal. This significantly reduces resource consumption and accelerates page switching while still achieving the goal of enlarging the text display area.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS9600451B2Method, terminal, and server for displaying file

Publication Date: 2017.03.21 XIAOMI INC

AI summary

A method for a terminal to display a file includes sending to a server a file specification corresponding to the file; receiving from the server a data package for trimming page margins of the file, wherein the data package is generated according to the file specification, and includes margin trimming data of a page of the file; and displaying the page of the file based on the received data package.