Display Module Heat Conduction for Uniform AMOLED Brightness
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Solution Overview
Problem
Active matrix organic light emitting diode (AMOLED) display screens experience non-uniform brightness due to uneven heat distribution, particularly when a photosensitive module is added for fingerprint unlocking, as the glass plate in the module disrupts heat conduction.
Innovation Solution
A display module design that includes a first heat conduction member laminated on the non-display surface of the screen, a photosensitive module attached to an exposed portion of the heat conduction member, and a second heat conduction member that contacts both the photosensitive module and the first heat conduction member, increasing the heat exchange area to achieve uniform temperature across the screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a photosensitive module is added to the display screen for fingerprint unlocking, then the fingerprint unlocking function is improved, but the heat distribution becomes non-uniform causing display brightness non-uniformity
Solution Approach 1:
A second heat conduction member is introduced as an intermediary component between the photosensitive module and the first heat conduction member. This mediator facilitates heat transfer from the photosensitive module area to the rest of the display screen, resolving the heat distribution non-uniformity caused by the photosensitive module while preserving its fingerprint unlocking function
Solution Approach 2:
The heat conduction system is segmented into multiple components: a first heat conduction member laminated on the non-display surface, and a second heat conduction member specifically positioned to contact the photosensitive module. This segmentation allows targeted heat management in different areas of the display screen
2Strength
If the glass plate in the photosensitive module is used, then the structural integrity is improved, but the heat conduction is disrupted causing non-uniform brightness
Solution Approach 1:
The second heat conduction member acts as a mediator that compensates for the poor heat conduction of the glass plate in the photosensitive module. It provides an alternative heat transfer path that bypasses the thermal barrier created by the glass plate, maintaining both structural integrity and display uniformity
Solution Approach 2:
The solution changes the thermal conduction parameters by introducing materials with different thermal conductivity properties. The second heat conduction member uses materials optimized for heat transfer to compensate for the low thermal conductivity of the glass plate, thereby improving overall heat distribution
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 ensures uniform heat distribution across the display screen, thereby eliminating non-uniform brightness issues when the screen is activated, by enhancing heat exchange between the photosensitive module area and the rest of the screen.
Implementation Method 1
The second heat conduction member contacts each of the photosensitive module and the first heat conduction member... speeds up heat exchange between the area with the photosensitive module and other area of the display screen
Data Source
AI summary
Provided are a display module and an electronic device. The display module includes a display screen, the display screen comprising a display surface and a non-display surface opposite to the display surface; a first heat conduction member, the first heat conduction member laminated on the non-display surface, a first through hole defined in the first heat conduction member, the non-display surface comprising an exposed portion exposed in the first through hole; a photosensitive module, the photosensitive module laminated on the exposed portion; and a second heat conduction member contacting each of the photosensitive module and the first heat conduction member; the first heat conduction member comprising a first inner sidewall formed due to formation of the first through hole, and a contact area between the second heat conduction member and the photosensitive module is larger than an area of the photosensitive module directly facing the first inner sidewall.