OLED Keypad Display with Selective Light Emission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing keypad display technologies, such as LCDs, consume uniform power across the screen and lack an interface for displaying icons on the keypad, leading to inefficient power usage and user inconvenience.
Innovation Solution
A method and apparatus using Organic Light Emitting Diodes (OLEDs) to display a keypad by controlling light emission only in areas that need to be recognized by the user, allowing for power-saving and integrating icons within the keypad blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If LCD with uniform backlight is used to display keypad, then the entire screen is illuminated, but power consumption is uniformly high regardless of displayed area
Solution Approach 1:
The display screen is segmented into multiple independently controllable pixel regions corresponding to keypad areas. Each pixel or group of pixels can be individually activated or deactivated, allowing only the necessary keypad areas to emit light while leaving other regions dark, thereby reducing overall power consumption.
Solution Approach 2:
Different regions of the display are assigned different illumination states based on their functional requirements. The keypad areas require illumination for visibility, while non-keypad areas remain dark. This local differentiation of illumination quality enables selective power consumption matching the actual display needs.
2Ease of operation
If icon is displayed on separate screen from keypad, then keypad display is simple, but user interface complexity increases and user convenience decreases
Solution Approach 1:
The icon display area and keypad area are merged into a single integrated display structure. Icons are positioned within or adjacent to the keypad blocks on the same display surface, allowing users to access both keypad functions and application icons without switching screens or navigating to separate interfaces, thereby improving ease of operation.
Solution Approach 2:
The display structure is designed to serve multiple functions simultaneously: displaying keypad characters, showing application icons, and providing touch input capability. This multi-functional integration eliminates the need for separate dedicated screens for different functions, reducing overall interface complexity while maintaining user convenience.
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
Reduces power consumption by emitting light only in necessary areas and enables easy execution of applications by displaying icons on the keypad, enhancing user interaction and interface efficiency.
Implementation Method 1
displaying a keypad using Organic Light Emitting Diodes (OLEDs)
Implementation Method 2
emitting light in the OLED corresponding to the light-emitting area
Data Source
AI summary
A method and an apparatus for displaying a keypad on a touch screen are provided. The apparatus includes an Organic Light Emitting Diode (OLED). The method includes arranging at least one keypad block including at least one area, determining at least one light-emitting area among the areas, and displaying the at least one keypad block by emitting light in the OLED corresponding to the at least one light-emitting area.