Display Device Digitizer Integration with Bent Lower Frame
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Solution Overview
Problem
Display devices with integral lower frames and reflective sheets suffer from increased thickness and light leakage due to steps in the light incident portion, which hinder the integration of digitizers and affect light efficiency.
Innovation Solution
A display device design that integrates a digitizer and reflective sheet to minimize thickness, with a circuit board thickness less than or equal to the total thickness of the digitizer and reflective sheet, and a lower frame that accommodates the light source and light guide plate, eliminating steps in the light incident portion by bending around the light source and extending to support the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a lower frame and reflective sheet are integrally formed to minimize thickness, then the thickness of the display device is reduced, but light leakage is caused due to steps of the light incident portion
Solution Approach 1:
The patent segments the lower frame structure by introducing a recessed portion that specifically accommodates the light incident area. This segmentation allows the frame to have different height levels, creating a stepped structure where the light incident portion is positioned lower to eliminate steps that cause light leakage, while maintaining overall thinness of the display device.
2Length of stationary object
If the circuit board thickness is reduced to minimize overall device thickness, then the display device becomes thinner, but it becomes difficult to accommodate all necessary components without causing light leakage
Solution Approach 1:
The patent utilizes vertical dimensionality by creating a recessed portion in the lower frame. This allows the circuit board and other components to be positioned at different height levels within the same horizontal footprint, enabling compact component accommodation while maintaining thin overall device thickness and preventing light leakage through proper positioning of the light incident portion.
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 design minimizes the thickness of the display device and reduces or prevents light leakage, enhancing light efficiency by ensuring that light is effectively reflected and distributed to the display panel.
Implementation Method 1
a light guide plate in which light emitted from the light source is incident into a surface and is emitted to another surface
Implementation Method 2
a lower frame configured to support the display panel and to accommodate the light source and the light guide plate... enhancing light efficiency by ensuring that light is effectively reflected and distributed to the display panel
Implementation Method 3
An EMR digitizer senses a touch location utilizing a digitizer sensor substrate including a plurality of coils
Data Source
AI summary
A display device may include a display panel, at least one light source disposed on one side of the display panel, a circuit board to drive the light source, a light guide plate in which light emitted from the light source is incident into a surface and is emitted to another surface, and a lower frame to support the display panel and to accommodate the light source and the light guide plate. The lower frame may include a base substrate, a digitizer disposed on the base substrate, and a dummy digitizer pattern disposed on the base substrate and spaced apart from the digitizer. The circuit board may be disposed between the digitizer and the dummy digitizer pattern, and the lower frame may be bent and extend around the light source.