CN100357804C - Optical display device with switchable visual angle - Google Patents
Optical display device with switchable visual angle Download PDFInfo
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- CN100357804C CN100357804C CNB2004100905503A CN200410090550A CN100357804C CN 100357804 C CN100357804 C CN 100357804C CN B2004100905503 A CNB2004100905503 A CN B2004100905503A CN 200410090550 A CN200410090550 A CN 200410090550A CN 100357804 C CN100357804 C CN 100357804C
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Abstract
The present invention relates to an optical display device with switchable visual angles and a method. The optical display device comprises a display panel, a light disturbing assembly, a light guiding assembly and a switch, wherein the display panel displays an image; the light disturbing assembly is arranged on one side of the display panel to provide disturbing light; the light guiding assembly is adjacent to the display panel and is used for controlling the direction of the disturbing light and generating an image disturbing area in a visible area; the switch is used for switching the disturbing light of the light disturbing assembly.
Description
Technical field
The switchable optical display in the relevant a kind of visual angle of the present invention, and particularly relevant a kind of light that utilizes in flat-panel screens disturbs assembly to influence the optical display at the visual angle of optical display.
Background technology
The user of flat-panel screens is in the specific occasion or for some special purpose, or for the demand of confidentiality, wish only to be defined in the screen that people in specific region or the visual angle can watch display, the people in non-this specific region or the visual angle can't watch the displaying contents of display.To this, existing at present many relevant technology are in development, and for example following several method is to utilize specific technical characterictic to reach the displaying contents that can watch display in specific region or visual angle:
1. announce in US6445434B2 number at the United States Patent (USP) of Toshiba company, disclose the technology of a kind of both alignment layers (Alignment layer), utilize the difference that interconnects pixel alignment direction (rubbingdirection) on the both alignment layers, make the observer make image produce huge obfuscation because of gray-scale inversion, beyond the certain viewing angles in screen the place ahead, just can't observe the displaying contents of screen in the image of locating with great visual angle to observe.But the shortcoming of above-mentioned technology is: when not needing narrow visual angle, this layer structure must be removed.
2. in the United States Patent (USP) of Rockwell US6239853B1 number, disclosing a kind of structure causes light to have the printing opacity of specific direction to use to reach narrow visual angle purpose, but shortcoming is as described in the Toshiba (US6445434B2): when not needing narrow visual angle, this layer structure must be removed, except that this, more can make the screen deepening.
3. in the United States Patent (USP) of 3M company US6398370B1 number, provide a kind of structure, can observe image when being positioned at narrow visual angle prescription, but shortcoming also is: when not needing narrow visual angle, this layer structure must be removed as the window shutter pattern.
4. disclose a kind of structure in the United States Patent (USP) of Sharp company US5877829 number, this structure comprises that one points to a layer and a scattering layer.Point to layer and make the light that comes out backlight that the directive property of height be arranged, in narrow vision area luminance brightness is arranged, scattering behind the light transmission scattering layer.Make the visual angle concentrate on place, narrow visual angle by seeing through the sensing layer with scattering layer.
In above-mentioned known techniques,, all be to see through increase one deck structure to be placed on the display for reaching the function that reduces the visual angle.Yet in practical application, the user also wishes to open display view angle together to see displaying contents with on every side observer in the part occasion.Under this demand, the user must remove or add this one deck structure can reach the switchable purpose of display view angle, therefore uses the trouble that seems suitable.
Summary of the invention
In view of this, the purpose of this invention is to provide the switchable optical display in a kind of visual angle, utilize the stray light of switchable optics display device, the observer can reduce the visual angle or increase the visual angle and do not need to increase the cost that extra one deck structure does not need especially additionally to increase processing procedure yet, and the user improves ease of use.
According to purpose of the present invention, the switchable optical display in a kind of visual angle is proposed, this device comprises: a display panel, a light disturb assembly, a photoconduction to draw an assembly and a switch.Display panel is in order to showing an image, light disturb arrangement of components in display panel one side in order to stray light to be provided.Photoconduction draws assembly and is adjacent to display panel, in order to control stray light direction, and produces an image interference range in visible area, and it is catoptron that this photoconduction draws assembly, and this image interference range is positioned at the zone beyond the described display panel dead ahead.Switch disturbs component interference light in order to switches light.
According to purpose of the present invention, reintroduce the method at a kind of switchable optics display device visual angle, comprise: at first, open switch, trigger light and disturb assembly to produce stray light, draw assembly guiding stray light by photoconduction and produce an image interference range, in order to reduce the display view angle of display panel in display panel, it is catoptron that this photoconduction draws assembly, and this image interference range is positioned at the zone beyond the described display panel dead ahead.At last, off switch, relieving light disturbs the stray light of assembly, to increase the display view angle of display panel.
For above-mentioned purpose of the present invention, characteristics and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. is elaborated as follows:
Description of drawings
Fig. 1 is according to the switchable optical display synoptic diagram in the visual angle of first embodiment of the invention.
Fig. 2 is according to the switchable optical display synoptic diagram in the visual angle of second embodiment of the invention.
Fig. 3 is the method flow diagram at switchable optics display device visual angle.
Embodiment
The present invention utilizes to add light interference assembly in optical display, and utilizes a photoconduction to draw the assembly guide lights and disturb the stray light that assembly produced, and disturbs the display view angle of display device.Below will describe respectively with two embodiment.
First embodiment
Please refer to Fig. 1, it is the switchable optical display synoptic diagram in visual angle of first embodiment.The switchable optical display 100 in visual angle comprises: display panel 101, light disturb assembly 102, photoconduction to draw assembly 103 and switch 104.Display panel 101 is observer 110 in order to show image in display panel 101 dead aheads.In first embodiment, photoconduction draws assembly 103 and is catoptron, and display panel 101 can be LCD screen, plasma screen or organic light emitting display curtain etc.Light disturbs assembly 102 to can be cold-cathode fluorescence lamp (cold cathode fluorescent lamp; CCFL) or light emitting diode (lightemitting diode; LED), with as the lamp source that stray light 105 is provided.Light disturbs assembly 102 configurable in a side or each side of display panel 101, and light disturbs assembly 102 in order to stray light 105 to be provided.As shown in Figure 1, above-mentioned photoconduction draws assembly (catoptron) 103 and is arranged at the periphery that this light disturbs assembly 102, and the stray light 105 that light disturbs assembly 102 to produce draws the direction of assembly 103-catoptron control stray light 105 and produces an image interference range 120 via photoconduction.When observer 110 opens switch 104, when if observer 110 moves to image interference range 120 and observes display panel 101 again, backlight 130 approaching because of observed display panel 101 with the brightness of stray light 105, and the image contrast is reduced, just can't watch the shown presentation content of display panel 101 clearly.Yet if get back to display panel 101 dead aheads or be positioned at angle theta special angle with display panel 101 normal N as observer 110 to observe display panel 101, because of stray light 105 not in display panel 101 dead aheads or above-mentioned special angle disturbs with interior generation image, so observer 110 still can clearly watch the image of display panel 101 in direct-view regional 140.In first embodiment, photoconduction draws assembly 103-catoptron and directly stray light 105 reflections is controlled to cause image interference range 120.
Second embodiment
Please refer to Fig. 2, it is the switchable optical display synoptic diagram in visual angle of second embodiment.The switchable optical display 200 in visual angle comprises: a display panel 201, a light disturb assembly 202, a photoconduction to draw an assembly 203 and a switch 204.Display panel 201 is an observer 210 in order to show image in display panel 201 dead aheads.In a second embodiment, photoconduction draws assembly 203 and is light guide plate.When switch 204 starts light interference assembly 202, light disturbs assembly 202 to send stray light 205, utilize the photoconduction of configured in advance before display panel 201 to draw assembly 203-light guide plate, control stray light 205 is in the distribution of display panel 201, the photoconduction of present embodiment draws assembly 203-light guide plate control stray light 205 and outwards disperses, and generation image interference range 220, when observer 210 is positioned at image interference range 220 observation display panels 201, because stray light 220 and approaching by 230 brightness backlight of dispersing out in the display panel 201, image contrast when therefore making the observer's 210 observation display panels 201 in the image interference range 220 significantly reduces, observer 210 just can't clear visual display panel 201 image, and still can visual display panel 201 regional 240 observers 210 of direct-view.
Please refer to Fig. 3, Fig. 3 is according to the above embodiment of the present invention one and the method flow diagram of two announcement technology of embodiment with switchable optics display device visual angle.Switchable optics display device method step comprises: at first, in step 301, open switch, trigger light and disturb assembly to produce stray light, draw assembly guiding stray light by photoconduction and produce the image interference range in display panel, in order to reduce the display view angle of display panel.At last, step 303, off switch, relieving light disturbs the stray light of assembly, to increase the display view angle of display panel.
In above-mentioned steps 301, when closing the function that switches to narrow visual angle as switch module, but display device is promptly with the mode show image content of normal display view angle.
Utilize above-mentioned first embodiment of the present invention and the described device and method of second embodiment, do not need to allow the observer when using display device, must to utilize newly-increased or remove one deck structure and reach the purpose of switching the visual angle, only need open or close switch starts stray light or closes stray light, can reach the purpose that switch at the visual angle, thereby increase the convenience on using.
In sum; though the present invention discloses as above with a preferred embodiment; yet it is not in order to limit the present invention; any person skilled in the art person without departing from the spirit and scope of the present invention; when the change that can make various equivalences or replacement, so protection scope of the present invention is when looking accompanying being as the criterion that the application's claim scope defined.
Claims (7)
1. optical display comprises:
One display panel;
One light disturbs assembly, is disposed at a side of this display panel, and this light disturbs assembly in order to a stray light to be provided; And
One photoconduction draws assembly, is adjacent to this display panel, and in order to control this interference direction of light and to produce an image interference range, it is catoptron that this photoconduction draws assembly, and this image interference range is positioned at the zone beyond the described display panel dead ahead.
2. optical display as claimed in claim 1 is characterized in that also comprising a switch, and this switch is in order to switch the stray light that this light disturbs assembly.
3. optical display as claimed in claim 1 is characterized in that this display panel is a display panels.
4. optical display as claimed in claim 1 is characterized in that it is a light emitting diode that this light disturbs assembly.
5. optical display as claimed in claim 1 is characterized in that it is a cold-cathode fluorescence lamp that this light disturbs assembly.
6. optical display as claimed in claim 1 is characterized in that this catoptron is arranged at the periphery that this light disturbs assembly, in order to control this interference direction of light.
7. the method at a switchable optics display device visual angle, this optical display has a display panel, and a light that is disposed at this display panel one side disturbs assembly, and a photoconduction that is adjacent to this display panel draws assembly, reach one in order to control the switch that this light disturbs assembly, this method comprises:
Open this switch, triggering a light disturbs assembly to produce a stray light, drawing assembly by a photoconduction guides this stray light and produces an image interference range in a display panel, in order to reduce the display view angle of this display panel, it is catoptron that this photoconduction draws assembly, and wherein this image interference range is positioned at zone in addition, described display panel dead ahead;
Close this switch, remove the stray light that this light disturbs assembly, to increase the display view angle of this display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100905503A CN100357804C (en) | 2004-11-08 | 2004-11-08 | Optical display device with switchable visual angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100905503A CN100357804C (en) | 2004-11-08 | 2004-11-08 | Optical display device with switchable visual angle |
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| Publication Number | Publication Date |
|---|---|
| CN1603901A CN1603901A (en) | 2005-04-06 |
| CN100357804C true CN100357804C (en) | 2007-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100905503A Active CN100357804C (en) | 2004-11-08 | 2004-11-08 | Optical display device with switchable visual angle |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104933999B (en) * | 2014-03-21 | 2018-12-14 | 联想(北京)有限公司 | Display device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07124292A (en) * | 1993-10-29 | 1995-05-16 | Casio Comput Co Ltd | Display device |
| JP2000194271A (en) * | 1998-12-25 | 2000-07-14 | Fujitsu Denso Ltd | Display device and display control method |
| CN1311452A (en) * | 2000-02-29 | 2001-09-05 | 阿尔卑斯电气株式会社 | Liquid crystal display device |
| JP2002023160A (en) * | 2000-07-12 | 2002-01-23 | Nippon Telegr & Teleph Corp <Ntt> | Optical element and display device provided with the same |
| CN1400497A (en) * | 2001-08-01 | 2003-03-05 | 三星电子株式会社 | Light conducting plate, its liquid crystal device and image displaying method with the device |
| CN1532596A (en) * | 2003-03-21 | 2004-09-29 | Lg.������Lcd��ʽ���� | Double liquid crystal display device using double front lighting unit |
-
2004
- 2004-11-08 CN CNB2004100905503A patent/CN100357804C/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07124292A (en) * | 1993-10-29 | 1995-05-16 | Casio Comput Co Ltd | Display device |
| JP2000194271A (en) * | 1998-12-25 | 2000-07-14 | Fujitsu Denso Ltd | Display device and display control method |
| CN1311452A (en) * | 2000-02-29 | 2001-09-05 | 阿尔卑斯电气株式会社 | Liquid crystal display device |
| JP2002023160A (en) * | 2000-07-12 | 2002-01-23 | Nippon Telegr & Teleph Corp <Ntt> | Optical element and display device provided with the same |
| CN1400497A (en) * | 2001-08-01 | 2003-03-05 | 三星电子株式会社 | Light conducting plate, its liquid crystal device and image displaying method with the device |
| CN1532596A (en) * | 2003-03-21 | 2004-09-29 | Lg.������Lcd��ʽ���� | Double liquid crystal display device using double front lighting unit |
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| Publication number | Publication date |
|---|---|
| CN1603901A (en) | 2005-04-06 |
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