Display Panel Sub-Pixel Circuit for Independent Viewing Angle Modes

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Solution Overview

Problem

Existing display technologies lack the ability to freely control the viewing angle of a display device, particularly in units of pixels, which is essential for applications like vehicle displays where personalized and shared content needs to be shown to specific or multiple users.

Innovation Solution

A display panel with sub-pixels that include a driving element, light-emitting elements, and a mode selection circuit, allowing independent control of viewing angles through various switch elements and signals, enabling flexible viewing angle adjustment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the entire screen is controlled at a specific viewing angle, then the control is simple, but the viewing angle cannot be partially controlled for different users

Engineering Contradiction:

Improveviewing angle control flexibilityVSAvoidpixel circuit complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The screen is divided into multiple pixel regions, each capable of independent viewing angle control. The pixel circuit is segmented into multiple switch elements (first switch element, second switch element, third switch element, fourth switch element) that can independently control different light-emitting elements, enabling different viewing angles for different screen areas.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The viewing angle of each pixel is made dynamically adjustable through mode selection circuits that can switch between different light-emitting elements based on control signals. This allows the viewing angle to be changed in real-time without physical movement, adapting to different user needs dynamically.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If multiple light-emitting elements are added to each pixel for different viewing angles, then viewing angle control is achieved, but power consumption increases

Engineering Contradiction:

Improveviewing angle adjustment capabilityVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

Different light-emitting elements are activated locally based on the required viewing angle for each pixel region. Only the necessary light-emitting elements are driven at any given time, rather than all elements operating simultaneously, thus reducing overall power consumption while maintaining viewing angle flexibility.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The mode selection circuit switches between different light-emitting elements in a periodic or sequential manner based on control signals. This allows the system to alternate between different viewing angle modes, activating only the required light-emitting elements during each period, thereby managing power consumption effectively.

Inventive Principle:

Principle #19Periodic action

3Ease of operation

If viewing angle is controlled in preset screen areas, then implementation is easier, but free control of viewing angle at all positions is not achieved

Engineering Contradiction:

Improveviewing angle control easeVSAvoidviewing angle control freedom

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The pixel circuit is designed with universal control capability through multiple switch elements and light-emitting elements that can be activated in any combination. This allows any pixel on the screen to be controlled independently for viewing angle adjustment, providing both ease of operation through standardized circuits and freedom in controlling any position on the screen.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The control system adds a new dimension of freedom by enabling continuous or arbitrary positioning of viewing angle control across the screen, rather than being limited to preset areas. The mode selection circuits allow independent control of each pixel's viewing angle, transforming the control from area-based to position-free.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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

Enables low power consumption and optimized processes while allowing precise control of viewing angles, distinguishing between window and background pixel areas, enhancing user privacy and content sharing capabilities.

Implementation Method 1

The organic light-emitting display device includes an organic light-emitting diode (hereinafter, referred to as 'OLED') that emits light by itself

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS12573343B2Display panel and display device including the same

Publication Date: 2026.03.10 LG DISPLAY CO LTD

AI summary

A display device may include a driving element configured to generate a current; a first light-emitting element configured to emit light by the current from the driving element; a second light-emitting element configured to emit light by the current from the driving element; a mode selection circuit configured to select a current path from the driving element in response to a first horizontal mode selection signal, a second horizontal mode selection signal, a vertical mode selection signal, and a bridge signal.