Ubiquitously mountable image display system
US-2024103309-A1 · Mar 28, 2024 · US
Techniques for Dual Modulation with Light Conversion
US2018031921A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018031921-A1 |
| Application number | US-201715726199-A |
| Country | US |
| Kind code | A1 |
| Filing date | Oct 5, 2017 |
| Priority date | Aug 21, 2014 |
| Publication date | Feb 1, 2018 |
| Grant date | — |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
Techniques for driving a dual modulation display include generating backlight drive signals to drive individually-controllable illumination sources. The illumination sources emit first light onto a light conversion layer. The light conversion layer converts the first light, such as blue or ultraviolet light, into second light, such as white light. The light conversion layer can include quantum dot materials. Liquid crystal display (LCD) modulation drive signals are generated to determine transmission of the second light through individual color subpixels of the display. These LCD modulation drive signals can be adjusted based on one or more light field simulations to account for non-uniform, spatial color shifts. Alternatively, one or more light field simulations based on a uniformity assumption determine intermediate LCD modulation drive signals. A compensation field simulation, using backlight drive signals, is then used to adjust the intermediate LCD modulation drive signal for color correction.
First claim
Opening claim text (preview).
What is claimed is: 1 . A method for driving a display comprising: emitting first light by one or more illumination sources onto a quantum dot layer; converting the first light into second light by the quantum dot layer; determining intermediate display modulation drive signals by one or more light field simulations; determining a compensation field for spatial color non-uniformity related to traveling distances of light from the one or more illumination sources; and compensating for the spatial color non-uniformity by adjusting the intermediate display modulation drive signals. 2 . The method of claim 1 wherein the traveling distances account for one or more reflections. 3 . The method of claim 1 wherein the quantum dot layer is a single sheet. 4 . The method of claim 1 wherein the quantum dot layer comprises a plurality of segments. 5 . The method of claim 1 wherein the one or more illumination sources are individually controllable. 6 . An apparatus comprising a processor and configured to perform the method recited in claim 1 .
Assignees
Inventors
Classifications
Improving the luminance or brightness uniformity across the screen · CPC title
Temperature compensation · CPC title
Compensation of deficiencies in the appearance of colours · CPC title
Modulation of illumination source brightness and image signal correlated to each other · CPC title
Micro- or nanomaterials · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US2018031921A1 cover?
- Techniques for driving a dual modulation display include generating backlight drive signals to drive individually-controllable illumination sources. The illumination sources emit first light onto a light conversion layer. The light conversion layer converts the first light, such as blue or ultraviolet light, into second light, such as white light. The light conversion layer can include quantum …
- Who is the assignee on this patent?
- Dolby Laboratories Licensing Corp
- What technology area does this patent fall under?
- Primary CPC classification G09G3/3426. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Feb 01 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).