JP2010277901A5 - - Google Patents
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- JP2010277901A5 JP2010277901A5 JP2009130427A JP2009130427A JP2010277901A5 JP 2010277901 A5 JP2010277901 A5 JP 2010277901A5 JP 2009130427 A JP2009130427 A JP 2009130427A JP 2009130427 A JP2009130427 A JP 2009130427A JP 2010277901 A5 JP2010277901 A5 JP 2010277901A5
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- liquid crystal
- crystal display
- light
- backlight units
- display device
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Description
本発明に係る液晶表示装置は、液晶表示パネルと、この液晶表示パネルの背面側に、液晶表示パネルの表示面に対して平行に重ね合わせて配置された複数のバックライトユニットとを備えて構成される。複数のバックライトユニットは、個別に光源を備え、表示面の正面方向の輝度が最も高く、かつ表示面の正面方向に対し輝度が半分になる角度が複数のバックライトユニット間で異なるように互いに異なる配光分布で発光するよう構成されている。複数のバックライトユニットからそれぞれ発光された光は、表示面と平行な面において空間的に重ね合わされ、液晶表示パネルの背面を照明する照明光となる。複数のバックライトユニットの各光源の発光量をバックライトユニット毎に制御することにより、照明光の表示面の正面方向に対し輝度が半分になる角度を変更し、液晶表示パネルの表示面の正面方向の輝度を所定の輝度に保ちながら、複数のバックライトユニットの発光量を個別に制御する。 A liquid crystal display device according to the present invention includes a liquid crystal display panel, and a plurality of backlight units arranged on the back side of the liquid crystal display panel so as to be parallel to the display surface of the liquid crystal display panel. Is done. The plurality of backlight units are individually provided with a light source , and have the highest luminance in the front direction of the display surface, and each other so that the angle at which the luminance is halved with respect to the front direction of the display surface differs among the plurality of backlight units. It is configured to emit light with different light distribution. Light emitted from each of the plurality of backlight units is spatially superimposed on a plane parallel to the display surface, and becomes illumination light for illuminating the back surface of the liquid crystal display panel. By controlling the amount of light emitted from each light source of the plurality of backlight units for each backlight unit, the angle at which the luminance is halved with respect to the front direction of the display surface of the illumination light is changed, and the front of the display surface of the liquid crystal display panel is changed. While maintaining the luminance in the direction at a predetermined luminance, the light emission amounts of the plurality of backlight units are individually controlled.
Claims (8)
前記液晶表示パネルの背面側に、前記液晶表示パネルの表示面に対して平行に重ね合わせて配置された複数のバックライトユニットと
を備え、
前記複数のバックライトユニットは、個別に光源を備え、表示面の正面方向の輝度が最も高く、かつ表示面の正面方向に対し輝度が半分になる角度が複数のバックライトユニット間で異なるように互いに異なる配光分布で発光するよう構成されており、
前記複数のバックライトユニットからそれぞれ発光された光は、表示面と平行な面において空間的に重ね合わされ、前記液晶表示パネルの背面を照明する照明光となり、
前記複数のバックライトユニットの各光源の発光量をバックライトユニット毎に制御することにより、前記照明光の表示面の正面方向に対し輝度が半分になる角度を変更し、
前記液晶表示パネルの表示面の正面方向の輝度を所定の輝度に保ちながら、前記複数のバックライトユニットの発光量を個別に制御すること
を特徴とする液晶表示装置。 A liquid crystal display panel;
A plurality of backlight units arranged on the back side of the liquid crystal display panel so as to be overlapped in parallel with the display surface of the liquid crystal display panel;
The plurality of backlight units are individually provided with light sources so that the luminance in the front direction of the display surface is the highest and the angle at which the luminance is halved with respect to the front direction of the display surface is different among the plurality of backlight units. It is configured to emit light with different light distributions,
The light emitted from each of the plurality of backlight units is spatially superimposed on a plane parallel to the display surface, and becomes illumination light that illuminates the back surface of the liquid crystal display panel.
By controlling the amount of light emitted from each light source of the plurality of backlight units for each backlight unit, the angle at which the luminance is halved with respect to the front direction of the display surface of the illumination light is changed,
A liquid crystal display device, wherein the light emission amounts of the plurality of backlight units are individually controlled while maintaining the luminance in the front direction of the display surface of the liquid crystal display panel at a predetermined luminance.
前記複数のバックライトユニットの発光量を、前記観察者検知装置によって検知した観察者の位置に基づいて制御すること
を特徴とする請求項１乃至６のいずれか１項に記載の液晶表示装置。 Further comprising an observer detection device,
7. The liquid crystal display device according to claim 1, wherein light emission amounts of the plurality of backlight units are controlled based on a position of an observer detected by the observer detection device.
前記複数のバックライトユニットの発光量を、前記ユーザー視野角選択手段におけるユーザーの選択に基づいて制御すること
を特徴とする請求項１乃至７のいずれか１項に記載の液晶表示装置。 It further comprises a user viewing angle selection means that allows the user to select a viewing angle
8. The liquid crystal display device according to claim 1, wherein the light emission amounts of the plurality of backlight units are controlled based on a user's selection in the user viewing angle selection unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009130427A JP2010277901A (en) | 2009-05-29 | 2009-05-29 | Liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009130427A JP2010277901A (en) | 2009-05-29 | 2009-05-29 | Liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2010277901A JP2010277901A (en) | 2010-12-09 |
| JP2010277901A5 true JP2010277901A5 (en) | 2012-07-05 |
Family
ID=43424673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2009130427A Pending JP2010277901A (en) | 2009-05-29 | 2009-05-29 | Liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2010277901A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8928567B2 (en) | 2010-08-31 | 2015-01-06 | Sharp Laboratories Of America, Inc. | Switchable viewing angle display |
| JP6032436B2 (en) * | 2011-11-28 | 2016-11-30 | パナソニックＩｐマネジメント株式会社 | Display device |
| EP3198191B1 (en) * | 2014-09-25 | 2018-11-21 | Koninklijke Philips N.V. | Display device with directional control of the output, and a backlight for such a display device |
| US10810969B2 (en) | 2017-01-16 | 2020-10-20 | Mitsubishi Electric Corporation | Texture display device, texture display method, and texture display program |
| CA3053815C (en) * | 2017-03-25 | 2021-10-19 | Leia Inc. | Mode-switchable backlight, privacy display, and method |
| DE102020001232B3 (en) * | 2020-02-18 | 2021-03-04 | Sioptica Gmbh | Lighting device for a screen for a free and a restricted viewing mode and screen with the same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008077946A (en) * | 2006-09-20 | 2008-04-03 | Citizen Electronics Co Ltd | Backlight unit and display equipped with it |
| JP2008084651A (en) * | 2006-09-27 | 2008-04-10 | Epson Imaging Devices Corp | Lighting device, electro-optical device, electronic equipment |
| JP4748684B2 (en) * | 2006-11-15 | 2011-08-17 | シチズン電子株式会社 | Backlight unit and display device |
| JP2008262906A (en) * | 2007-03-16 | 2008-10-30 | Dtmc:Kk | Back-light unit |
-
2009
- 2009-05-29 JP JP2009130427A patent/JP2010277901A/en active Pending
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