Invalidity dossier
US 6132053
Optimized highly efficient large area modular flat panel display lighting device
Current assignee: Baker Electronics Inc
Added 9/23/2026, 3:40:39 PM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US 6,132,053
Title: Optimized highly efficient large area modular flat panel display lighting device
Patent number: US 6,132,053 (US6132053A)
Application number: US09/097,688
Inventor: Mariana Sendova
Assignee: Baker Electronics Inc. (original and current assignee listed)
Priority date: 1997-06-17
Filing date: 1998-06-16
Publication/grant date: 2000-10-17
Legal status (as listed): Expired – Lifetime; anticipated expiration 2018-06-16
Purpose: The patent concerns flat panel display screens, specifically a flat panel display lighting device using a plurality of microgrooves with varying groove density. It addresses backlighting for liquid crystal displays (LCDs), aiming at optimized, highly efficient, large-area, modular illumination.
Plain-language scope: Conventional microgroove LCD backlights use edge-lit light guides with V-shaped microgrooves whose facets reflect otherwise totally internally reflected light out the front toward the LCD. The supplied text states that such conventional devices use fixed groove density and specify no relationship between groove density and lighting uniformity as viewed from the front surface. The invention instead uses microgrooves having varying groove density to improve uniformity and efficiency.
The excerpt describes background structure: a light guide with a front planar surface and an opposite back light-extracting/reflecting surface formed by V-shaped microgrooves; groove angles typically 45–90 degrees; microgroove depths often 2.5–10 micrometers; a constant groove step 18 along surface 14 in the conventional arrangement; edge light input surfaces (20a, 20b) adjacent a light source (21), optional U-shaped reflector (26) and reflectors (28, 38); and a reflector 38 that may be replaced by a second light source. Named prior-art patents cited in the text are U.S. Pat. Nos. 5,485,354 (Ciupke et al.), 5,442,523 (Kasima et al.), and 5,390,276 (Tai et al.).
What the excerpt does not establish: The supplied text is expressly an excerpt with omitted text. It does not provide the full claims, the complete detailed description, specific quantitative density-varying relationships, embodiments of the "modular" aspect, or figures. Absent claim language, the precise legal scope of the invention is not established here.
Generated 10/1/2026, 9:51:25 PM
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Litigation summary
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PTAB challenges
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Assignment history
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Prior art
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Obviousness
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Extensions
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Derivative works
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