Tablet LCD with Photoelectromotive Force Layers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional tablet liquid crystal display devices face issues with decreased luminance and image quality due to light interference between transparent layers in touch screen types and increased thickness, weight, and manufacturing costs in digitizer types, along with input errors from electromagnetic waves and pen interactions.
Innovation Solution
A tablet liquid crystal display device featuring a liquid crystal panel with a black matrix and a signal recognizing section comprising photoelectromotive force generation layers, an insulating layer, and a protection layer, which senses light signals to generate electromotive forces and receive input signals without a separate reception device, reducing thickness and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a touch screen panel is attached to the front portion of the liquid crystal display device, then input signal reception is enabled, but the permeability of the liquid crystal panel is deteriorated and luminance is decreased
Solution Approach 1:
The patent merges the input signal reception function directly into the liquid crystal panel structure by forming photoelectromotive force generation layers (P-type and N-type semiconductor layers) within the panel itself, eliminating the need for a separate touch screen panel. This integration maintains panel permeability and luminance while enabling input signal reception through light-induced electromotive force generation.
2Ease of operation
If a touch screen panel is attached to the front portion of the liquid crystal display device, then input signal reception is enabled, but light interference phenomenon occurs between transparent layers and image quality is deteriorated
Solution Approach 1:
The patent combines the input signal reception function into the liquid crystal panel structure by forming photoelectromotive force generation layers within the panel, eliminating the need for separate transparent touch screen layers. This integration prevents light interference between multiple transparent layers while maintaining image quality.
3Ease of operation
If a separate antenna board and control panel are contained for receiving input signals, then input signal reception is enabled, but thickness, weight and manufacturing cost increase
Solution Approach 1:
The patent merges the antenna board and control panel functions directly into the liquid crystal panel by forming photoelectromotive force generation layers (P-type and N-type semiconductor layers) within the panel structure. This integration eliminates separate components, reducing weight while enabling input signal reception through light-induced electromotive force generation.
Solution Approach 2:
The liquid crystal panel is designed to serve multiple functions simultaneously: display function through liquid crystal modulation and input signal reception function through photoelectromotive force generation. This multi-functionality eliminates the need for separate antenna board and control panel, reducing overall weight.
4Ease of operation
If electromagnetic waves are generated from the electronic pen, then input signal transmission is enabled, but image signal distortion phenomenon occurs at outer portion of display area and input errors occur
Solution Approach 1:
The patent replaces the electromagnetic wave-based input signal transmission (electronic pen) with a light-based system. A light irradiating device emits light signals that are converted to electromotive force by photoelectromotive force generation layers within the liquid crystal panel, eliminating electromagnetic interference and improving input accuracy.
5Ease of operation
If electromagnetic waves from electronic pen and driving signals of liquid crystal display device are interfered with, then input signal transmission is enabled, but device malfunction occurs
Solution Approach 1:
The patent replaces electromagnetic wave-based input signal transmission with a light-based system. Light irradiating device emits light signals that are converted to electromotive force by photoelectromotive force generation layers, eliminating electromagnetic interference between input signals and liquid crystal driving signals, ensuring device stability.
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
The solution prevents image quality deterioration, reduces thickness and weight, and minimizes input errors by precisely applying light signals to the display screen, enhancing the overall performance and manufacturing efficiency of the device.
Implementation Method 1
a signal recognizing section for generating an electromotive force according to a light signal inputted from an exterior
Data Source
AI summary
Disclosed is a tablet liquid crystal display device which senses light applied from a light irradiating device to receive an input signal applied from an exterior. The tablet liquid crystal display device comprising: a liquid crystal panel for displaying an image, including a black matrix formed in a lattice form; and a signal recognizing section for generating an electromotive force according to a light signal inputted from an exterior, wherein the signal recognizing section comprises: a plurality of first photoelectromotive force generation layers, each of which is located above the black matrix in a sectional view, is overlapped with the black matrix in a plan view, and extends in a first direction; an insulating layer deposited to cover at least an upper surface of the first electromotive force generation layers; a plurality of second photoelectromotive force generation layers, each of which is located above the black matrix in a sectional view, is overlapped with the black matrix in a plan view, and extends in a second direction perpendicular to the first direction; and a protection layer deposited over an entire area of the signal recognizing section.