Optical recognition device and optical recognition display comprising the same

An optical recognition device is provided. The optical recognition device includes a transparent substrate, a patterned infrared reflective film formed thereon, and an infrared anti-reflective film sheltering a gap in a recognition pattern of the patterned infrared reflective film, wherein the patterned infrared reflective film reflects the recognition pattern by reflection of infrared light and transmission of visible light. The invention also provides a display incorporating the optical recognition device.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to an optical device, and in particular, to an optical recognition device and an optical recognition display comprising the same.

2. Description of the Related Art

Conventional hand-writing input human-machine interfaces or display panels are divided into resistance-types, capacitance-types, inductance-types or optic-types, without requirement of an additional keyboard or other bulky input devices.

However, the accuracy of location and rapid hand-writing onto the human-machine interfaces cannot be achieved due to low resolution and long response time. Recently, many corporations have developed technology to combat the before mentioned deficiencies. For example, Wacom developed an electromagnetic-induced hand-writing input panel. However, the product has not get popular because of high cost. Conventional optical recognition devices are composed of multi-layered films formed by low-refraction films and high-refraction films. The multi-layered film allows transmission of visible light (400˜700 nm), but reflects non-visible light with a specific wavelength (for example, infrared light (IR) region: 850˜950 nm). The formed image is then captured by an image capture device to determine its location. However, undesirable reflected non-visible light may occur from reflections in the gap of the multi-layered film, and thus deteriorating optical recognition.

BRIEF SUMMARY OF THE INVENTION

An embodiment of the invention provides an optical recognition device comprising a transparent substrate, a patterned multi-layered film formed on the transparent substrate, and an anti-reflective optical film sheltering a gap in a recognition pattern of the patterned multi-layered film.

An embodiment of the invention provides an optical recognition device comprising a transparent substrate, an anti-reflective optical film formed on the transparent substrate, and a patterned multi-layered film formed on the anti-reflective optical film.

An embodiment of the invention provides an optical recognition device comprising a transparent substrate, an anti-reflective optical film formed on a first surface of the transparent substrate, and a patterned multi-layered film formed on a second surface of the transparent substrate.

An embodiment of the invention provides an optical recognition device comprising a transparent substrate, a patterned infrared reflective film formed on the transparent substrate, and an infrared anti-reflective film sheltering a gap in a recognition pattern of the patterned infrared reflective film, wherein the patterned infrared reflective film reflects the recognition pattern by reflection of infrared light and transmission of visible light.

An embodiment of the invention provides an optical recognition display comprising a display device for displaying a image having a transparent substrate and an optical recognition device comprising a patterned infrared reflective film formed on the transparent substrate and an infrared anti-reflective film sheltering a gap in a recognition pattern of the patterned infrared reflective film, wherein the patterned infrared reflective film reflects the recognition pattern by reflection of infrared light and transmission of visible light.

An embodiment of the invention provides an optical recognition display comprising a display panel having a transparent substrate, a patterned multi-layered film formed on the transparent substrate, and an anti-reflective optical film sheltering a gap in a recognition pattern of the patterned multi-layered film.

An embodiment of the invention provides an optical recognition display comprising a display panel having a transparent substrate, a polarizer formed on the transparent substrate, an anti-reflective optical film formed on the polarizer, and a patterned multi-layered film formed on the anti-reflective optical film.

An embodiment of the invention provides an optical recognition display comprising a display panel having a transparent substrate, an anti-reflective optical film formed on a first surface of the transparent substrate, a polarizer formed on a second surface of the transparent substrate, and a patterned multi-layered film formed on the polarizer.

DETAILED DESCRIPTION OF THE INVENTION

An embodiment of the invention provides an optical recognition device comprising a transparent substrate, a patterned multi-layered film such as a patterned infrared reflective film formed on the transparent substrate, and an anti-reflective optical film sheltering, i.e. shielding or covering, a gap in a recognition pattern of the patterned multi-layered film.

A cross sectional view of an optical recognition device in an embodiment of the invention is shown inFIG. 1. The optical recognition device10comprises a transparent substrate12, a patterned multi-layered film14, such as a patterned infrared reflective film, and an anti-reflective optical film16. The patterned multi-layered film14is formed on the transparent substrate12. The patterned multi-layered film14reflects a recognition pattern by reflection of infrared light and transmission of visible light. The anti-reflective optical film16shelters, i.e. shields or covers, a gap18in the recognition pattern of the patterned multi-layered film14. The gap18is an uncovered region or uncovered regions not covered by the patterned multi-layered film14, such as the gap in the recognition pattern or between the recognition patterns. The anti-reflective optical film16can also shelters the gap18between the recognition patterns or any region without the recognition pattern. In other words, the anti-reflective optical film16shelters, covers or shields any uncovered region not covered by the patterned multi-layered film14.

The transparent substrate12may be a glass substrate. The patterned multi-layered film14may be an infrared reflective film and comprise a plurality of low-refraction films such as silicon oxide (SiO2) and a plurality of high-refraction films such as niobium oxide (Nb2O5), tantalum oxide (Ta2O5), and titanium oxide (TiO2). The anti-reflective optical film16may be an anti-glare film or an anti-reflective film and comprise metal oxides or non-metal oxides, with a particle size of about 0.5˜2 μm.

The anti-glare film or anti-reflective film is disposed in the gap of the patterned multi-layered film by, for example, lithography etching or screen printing coating to reduce reflected light or scattered light from the substrate in the gap of the multi-layered film. Thus, a large halo area or an ambiguous recognition pattern is prevented when the optical recognition device is utilized in various viewing angles.

An embodiment of the invention provides an optical recognition display comprising a display panel having a transparent substrate, a polarizer formed on the transparent substrate, a patterned multi-layered film formed on the polarizer, and an anti-reflective optical film sheltering gap in a recognition pattern of the patterned multi-layered film.

A cross sectional view of an optical recognition display in an embodiment of the invention is shown inFIG. 2. The optical recognition display20comprises a transparent substrate12, a polarizer22, a patterned multi-layered film14, and an anti-reflective optical film16. The polarizer22is formed on the transparent substrate12. The patterned multi-layered film14is formed on the polarizer22. The anti-reflective optical film16shelters a gap18in the recognition pattern of the patterned multi-layered film14.

An embodiment of the invention provides an optical recognitions display comprising a display device such as a liquid crystal display device having a transparent substrate, a patterned multi-layered film formed on the transparent substrate, an anti-reflective optical film sheltering a gap in a recognition pattern of the patterned multi-layered film, and a polarizer formed on the patterned multi-layered film and the anti-reflective optical film.

A cross sectional view of an optical recognition display in an embodiment of the invention is shown inFIG. 12. The optical recognition display120comprises a transparent substrate12, a patterned multi-layered film14, an anti-reflective optical film16, and a polarizer22. The patterned multi-layered film14is formed on the transparent substrate12. The anti-reflective optical film16shelters a gap in the recognition pattern of the patterned multi-layered film14. The polarizer22is formed on the patterned multi-layered film14and the anti-reflective optical film16.

An embodiment of the invention provides an optical recognition device comprising a transparent substrate, an anti-reflective optical film formed on the transparent substrate, and a patterned multi-layered film formed on the anti-reflective optical film.

A cross sectional view of an optical recognition device in an embodiment of the invention is shown inFIG. 3. The optical recognition device30comprises a transparent substrate12, an anti-reflective optical film16, and a patterned multi-layered film14. The anti-reflective optical film16is formed on the transparent substrate12. The patterned multi-layered film14is formed on the anti-reflective optical film16.

The transparent substrate12may be a glass substrate. The anti-reflective optical film16may be an anti-glare film or an anti-reflective film and comprise metal oxides or non-metal oxides, with a particle size of about 0.5˜2 μn. The patterned multi-layered film14is one kind of an infrared reflective film and comprises a plurality of low-refraction films such as silicon oxide (SiO2) and a plurality of high-refraction films such as niobium oxide (Nb2O5), tantalum oxide (Ta2O5), and titanium oxide (TiO2).

An embodiment of the invention provides an optical recognition display comprising a display device. The display device includes a display panel having a transparent substrate in the upper part of the display device, a polarizer formed on the transparent substrate, an anti-reflective optical film formed on the polarizer, and a patterned multi-layered film formed on the anti-reflective optical film.

A cross sectional view of an optical recognition display in an embodiment of the invention is shown inFIG. 4. The optical recognition display40comprises a transparent substrate12, a polarizer22, an anti-reflective optical film16, and a patterned multi-layered film14. The polarizer22is formed on the transparent substrate12. The anti-reflective optical film16is formed on the polarizer22. The patterned multi-layered film14is formed on the anti-reflective optical film16.

An embodiment of the invention provides an optical recognition device comprising a transparent substrate, an anti-reflective optical film formed on a first surface of the transparent substrate, and a patterned multi-layered film formed on a second surface of the transparent substrate.

A cross sectional view of an optical recognition device in an embodiment of the invention is shown inFIG. 5. The optical recognition device50comprises a transparent substrate12, an anti-reflective optical film16, and a patterned multi-layered film14. The anti-reflective optical film16is formed on a first surface1201of the transparent substrate12. The patterned multi-layered film14is formed on a second surface1202of the transparent substrate12.

The transparent substrate12may be a glass substrate. The anti-reflective optical film16may be an anti-glare film or an anti-reflective film and comprise metal oxides or non-metal oxides, with a particle size of about 0.5˜2 μm. The patterned multi-layered film14may be an infrared reflective film and comprise a plurality of low-refraction films such as silicon oxide (SiO2) and a plurality of high-refraction films such as niobium oxide (Nb2O5), tantalum oxide (Ta2O5), and titanium oxide (TiO2).

An embodiment of the invention provides an optical recognition display comprising a display panel having a transparent substrate, an anti-reflective optical film formed on a first surface of the transparent substrate, a polarizer formed on a second surface of the transparent substrate, and a patterned multi-layered film formed on the polarizer.

A cross sectional view of an optical recognition display in an embodiment of the invention is shown inFIG. 6. The optical recognition display60comprises a transparent substrate12, a polarizer22, an anti-reflective optical film16, and a patterned multi-layered film14. The anti-reflective optical film16is formed on a first surface1201of the transparent substrate12. The polarizer22is formed on a second surface1202of the transparent substrate12. The patterned multi-layered film14is formed on the polarizer22.

An embodiment of the invention provides an optical recognition device comprising a transparent substrate, a patterned infrared reflective film formed on the transparent substrate, and an infrared anti-reflective film sheltering a gap in a recognition pattern of the patterned infrared reflective film, wherein the patterned infrared reflective film reflects the recognition pattern by reflection of infrared light and transmission of visible light.

A cross sectional view of an optical recognition device in an embodiment of the invention is shown inFIG. 7. The optical recognition device70comprises a transparent substrate12, a patterned infrared reflective film24, and an infrared anti-reflective film26. The patterned infrared reflective film24is formed on the transparent substrate12. The infrared anti-reflective film26shelters a gap in the recognition pattern of the patterned infrared reflective film24.

The transparent substrate12may be a glass substrate. The patterned infrared reflective film24comprises a plurality of low-refraction films such as silicon oxide (SiO2) and a plurality of high-refraction films such as niobium oxide (Nb2O5), tantalum oxide (Ta2O5), and titanium oxide (TiO2). The infrared anti-reflective film26may be an anti-glare film or an anti-reflective film and comprise metal oxides or non-metal oxides, with a particle size of about 0.5˜2 μm.

A cross sectional view of an optical recognition device in an embodiment of the invention is shown inFIG. 8. The optical recognition device80comprises a transparent substrate12, a patterned infrared reflective film24, and an infrared anti-reflective film26. The patterned infrared reflective film24is formed on the transparent substrate12. The infrared anti-reflective film26is formed on the patterned infrared reflective film24and the transparent substrate12.

A cross sectional view of an optical recognition device in an embodiment of the invention is shown inFIG. 9. The optical recognition device90comprises a transparent substrate12, a patterned infrared reflective film24, and an infrared anti-reflective film26. The infrared anti-reflective film26is formed on the transparent substrate12. The patterned infrared reflective film24is formed on the infrared anti-reflective film26.

A cross sectional view of an optical recognition device in an embodiment of the invention is shown inFIG. 10. The optical recognition device100comprises a transparent substrate12, a patterned infrared reflective film24, and an infrared anti-reflective film26. The infrared anti-reflective film26is formed on a first surface1201of the transparent substrate12. The patterned infrared reflective film24is formed on a second surface1202of the transparent substrate12.

An embodiment of the invention provides an optical recognition display comprising a display device for displaying an image comprising a transparent substrate and an optical recognition device comprising a patterned infrared reflective film formed on the transparent substrate and an infrared anti-reflective film sheltering a gap in a recognition pattern of the patterned infrared reflective film, wherein the patterned infrared reflective film reflects the recognition pattern by reflection of infrared light and transmission of visible light.

A cross sectional view of an optical recognition display in an embodiment of the invention is shown inFIG. 11. The optical recognition display110comprises a display device28, an optical recognition device32, and an infrared recognition device34such as an infrared recognition pen with an infrared generating device and an infrared receiving device. The display device28comprises a transparent substrate (not shown). The optical recognition device32comprises a patterned infrared reflective film (not shown) and an infrared anti-reflective film (not shown). The exemplified structures of the patterned infrared reflective film and the infrared anti-reflective film are shown inFIGS. 7˜10.

An embodiment of the invention provides a hand-writing input device suitable for use in various displays and capable of improving location accuracy and optical recognition.