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US 8,300,176 B2Granted
Liquid crystal display device having first and second reflective type polarizers and a retarder having retarding and non-retarding regions and backlight module thereof
AssigneeChimei Innolux Corporation
InventorChen-Pin Hung
Life of this patent
Estimating the term…
Abstract
A backlight module includes a reflection sheet and a film structure disposed above the reflection sheet with a gap therebetween. A light source is disposed in the gap between the reflection sheet and the film structure so as to provide light. The film structure includes a first region for reflecting light incident thereupon from the light source and the reflection sheet, and a plurality of second regions for transmitting at least partially light incident thereupon from the light source and the reflection sheet.
Claims16
A backlight module, comprising:
- a reflection sheet;
- a first reflective type polarizer disposed above the reflection sheet with a gap therebetween;
- a light source disposed in said gap between the reflection sheet and the first reflective type polarizer to provide light;
- a retarder disposed on the first reflective type polarizer, the retarder having a plurality of retarding regions and a non-retarding region;
- and
- a second reflective type polarizer disposed on the retarder, wherein
- the light provided by the light source penetrates the second reflective type polarizer through the functioning of the retarding regions, and
- a total area of the retarding regions per unit area of the retarder increases as the retarding regions are farther away from the light source.
5 more elements
A liquid crystal display (LCD), comprising:
- an LCD panel;
- and
- a backlight module, the backlight module comprising:
- a reflection sheet;
- a first reflective type polarizer disposed above the reflection sheet with a gap therebetween;
- a light source disposed in said gap between the reflection sheet and the first reflective type polarizer to provide light;
- a retarder disposed on the first reflective type polarizer, the retarder having a plurality of retarding regions and a non-retarding region;
- and
- a second reflective type polarizer disposed on the retarder, wherein
- the light provided by the light source penetrates the second reflective type polarizer through the functioning of the retarding regions, and
- a total area of the retarding regions per unit area of the retarder increases as the retarding regions are farther away from the light source.
8 more elements
A backlight module, comprising:
- a reflection sheet;
- a first reflective type polarizer disposed above the reflection sheet with a gap therebetween;
- a light source disposed in the gap between the reflection sheet and the first reflective type polarizer to provide light;
- a retarder disposed on the first reflective type polarizer, the retarder having a plurality of retarding regions and a non-retarding region;
- and
- a second reflective type polarizer disposed on the retarder, wherein
- the light provided by the light source penetrates the second reflective type polarizer through the functioning of the retarding regions,
- the backlight module further comprises a plurality of fasteners for fixing relative positions of the reflection sheet, the first reflective type polarizer, the retarder and the second reflective polarizer,
- the reflection sheet, the first reflective type polarizer, the retarder and the second reflective type polarizer have a plurality of through holes respectively, the fasteners running through the through holes to fasten the reflection sheet, the first reflective type polarizer, the retarder and the second reflective type polarizer, a largest dimension of at least one of the through holes being larger than a largest external diameter of the respective fasteners, and
- the reflection sheet, the first reflective type polarizer, the retarder and the second reflective type polarizer are flexible.
7 more elements
Dependencies are inferred from the claim text.