Light Shield Extending Beyond Display Region to Block Leakage
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Solution Overview
Problem
The narrow frame construction in display apparatuses leads to light leakage, deteriorating display quality due to incomplete light shielding, especially in direct-type and edge light-type backlight devices.
Innovation Solution
A display apparatus with a light shield extending from the support frame to overlap the light shielding region and outer region, featuring a fixture portion with apertures or hooks for secure fixation, and an elastic member for effective light interception and vibration protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a narrow frame construction is adopted to enlarge the display region, then the display region is enlarged, but light leakage occurs due to reduced overlap between the bezel and light-shield strip
Solution Approach 1:
A light shield is introduced as an intermediary component between the display panel and the support frame. This light shield extends into the outer region beyond the light shielding region, creating an additional barrier that intercepts light before it can leak through the reduced overlap area between the bezel and light-shield strip.
Solution Approach 2:
The light shield extends in the radial direction beyond the peripheral edge of the light shielding region, utilizing the outer region space that was previously unused for light shielding purposes. This dimensional extension allows light interception without compromising the display region size.
2Length of stationary object
If the region for bezel overlap with light-shield strip is reduced due to narrow frame construction, then the frame is narrower, but light from the backlight device leaks through the liquid crystal panel outside the light-shield strip
Solution Approach 1:
The light shield serves as a mediator that compensates for the reduced bezel overlap. By extending into the outer region, it creates an additional light interception barrier that makes up for the insufficient coverage from the reduced bezel overlap area.
3Object-affected harmful factors
If the light shield extends into the outer region, then light leakage is prevented, but the device complexity increases due to additional components and fixation structures
Solution Approach 1:
The light shield is integrated with the support frame structure, where the support frame includes an extension that provides fixation for the light shield. This merging approach allows the light shield to be secured without requiring completely separate fixation mechanisms, thereby reducing overall structural complexity.
Solution Approach 2:
The support frame extension serves multiple functions: it provides structural support for the display panel and simultaneously serves as a fixation mechanism for the light shield. This multi-functionality reduces the need for additional dedicated fixation components.
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
Prevents light leakage by ensuring complete light shielding, maintaining display quality and providing protection against vibrations and temperature-related movements.
Implementation Method 1
The light-shield strip intercepts light which is radiated from the backlight device toward the liquid crystal panel
Implementation Method 2
The optical sheet attains convergence, diffusion, and the like of the light from the backlight device
Implementation Method 3
As the panel chassis, that of white color is used in order to enhance the efficiency of light utility from the backlight device through reflection
Data Source
AI summary
A display apparatus has a display panel having a display region, a light shielding region surrounding the display region, and an outer region located outside of the light shielding region; a support frame disposed at a rear surface side of the display panel, the support frame including a panel supporting portion which supports a peripheral portion of the display panel from a rear side, and an extension beginning from the panel supporting portion and extending away from the display panel; and a light shield disposed at the rear surface side of the display panel, the light shield including a light-shielding portion which is disposed between the display panel and the support frame, the light-shielding portion extending so as to overlap at least a portion of the light shielding region and the outer region of the display panel as viewed from a normal direction of the display panel, and a fixture portion beginning from the light-shielding portion and extending away from the display panel, the fixture portion being fixed to the extension of the support frame.