摘要:
A side-lit illumination arrangement comprises a polarized-light-emitting waveguide comprising a polarization-selective beam-splitting interface formed at an interface of a waveguiding layer and a polarization-selection layer. In order to avoid alignment problems occurring during the manufacture of the waveguide which impair the proper functioning of the polarization-selective beam-splitting interface, the polarization-selective beam-splitting interface is planar. Waveguided light polarized and transmitted by the polarization-selective beam-splitting interface into the polarization-selection layer is coupled out by a relief-structured surface via an exit surface. Display devices having such waveguides, in particular if used in a front light, have a high brightness and efficiency.
摘要:
The invention relates to a color display device for display a color image and a method of operating such display. The color display device is provided with a plurality of picture elements, two selectable light sources having different predetermined radiance spectra, color selection means which in combination with the selectable light sources is able to produce respective first and second primary colors on the display panel and control means arranged to select alternately one of the selectable light sources and to provide a portion of the picture elements with image information corresponding to the respective primary colors obtainable with the selected light source. The primary colors of the display device can be selected in a time sequential and space sequential way which enable a reduction of a color break-up.
摘要:
This invention relates to an in-plan switching electrophoretic display device (IPS-EPD), comprising a layer of electrophoretic material (2), being sandwiched between a first and a second substrate (3, 4), a pixel of said display further comprising a first and a second electrode (5, 6) for locally controlling the material of said electrophoretic layer. The first and second electrodes (5, 6) are positioned on essentially the same distance from said first substrate, so that an essentially lateral field is generated in said electrophoretic layer (2) when a signal is applied over said electrodes (5, 6), in order to enable transflective operation. The display device may further comprise an optionally patterned reflector (8), and a light schielding layer (7).
摘要:
A touch sensitive matrix display senses touch input during a sense period (TS) in a separate sense area (A1) which is selected to be non-overlapping with a display area (A2) in which information is displayed dependent on the touch position which is sensed in the sense area (A1). During the sense period (TS), the sense area (A1) is not addressed. The non-address period of time (TR) occurring between two successive sense area addressing periods (TA2) of the sense area (A1) lasts at least as long as, but preferably substantially longer than, the display area address period (TA1,i) required to address the complete display area (A2). The data displayed in the sense area (A1) is refreshed by addressing the sense area (A1) during the sense area address periods (TA2) in-between the sense periods (TS). The data displayed in the sense area (A1) will not be disturbed by the sensing and will be present between two successive sense area addressing periods (TA2, TA2′) because the pixels 10 of the matrix display have an optical state which, when not addressed, is maintained longer than the non-address period (TR).
摘要:
This invention relates to an non-emissive display device which is arranged to operate using electro-optical modes, said display device comprising at least one individually addressable pixel (1,10), wherein at least one of scattering and absorption of light is arranged to occur within said pixel. The device comprises means for monitoring a grey scale level (8b,8c,8d,8e,15) within said at least one pixel (1,10), means for adjusting the grey scale level (20,21) of said pixel (1,10) and means for feeding grey scale information from said monitoring means to said adjusting means in order to control said adjusting means. The invention also relates to a method of driving a pixel of such a non-emissive display device.
摘要:
The electro-optical display device has a translucent front wall (12) and at least one pixel (10) with an electro-optical medium, a scattering medium (14) and a switching electrode (6) associated with the front wall (12), and drive means via which the pixel (10) can be brought to different optical states. According to the invention, the pixel (10) comprises a low-refractive index C material (21) with a refractive index nt in the range from 1.0≦1.4.4. Preferably, the low-refractive index material (21) is provided between the switching electrode (6) and the electro-optical medium. Preferably, the electro-optical medium is an electro-phoretic medium or an electro-chromic medium. The electro-optical display device combines a high brightness with a wide viewing angle.
摘要:
The invention relates to a collimator (1) for use in an optical device, such as a display device, an illumination device or an optical touch sensitive device. The collimator (1) according to the invention comprises a multi-layered sheet of preferably at least five alternating light transmitting (10) and light impervious layers (11). A collimation angle of a few degrees is obtainable using a collimator (1) according to the invention. The invention also relates to methods for producing such a collimator (1) by co-extruding or injection molding.
摘要:
The present invention relates to an apparatus for detecting an input position on a screen of a display monitor. The apparatus comprises a light guiding layer (301) having an optical structure such that a fraction (304) of the light (303) incident on the layer (301) from the apparatus' exterior is confined in the layer (301). The incident light (303) is emitted by a remote input device, operable by a user, for interacting with the apparatus. The remote input device is, for example, a laser pointer (205). Light detecting means (803) in the apparatus detects the light (304) confined in the layer (301). It is thus possible to determine the input position (206) where the light (207) from the input device enters the layer (301).
摘要:
Devices (1) comprising light detectors (11-14) for detecting light and in response generating detection information, and light-guiding layers (15) comprising outer sides for guiding incident light (21) arriving at the outer sides and originating from input devices (20) towards the light detectors (11-14) are provided with converters (16) for converting the detection information into further information for taking into account one or more angles between the incident light (21) and an axis perpendicular to the light-guiding layer (15). As a result, one/two-dimensional corrections of locations of incidence can be made, and one/two-dimensional estimations of directions of user locations can be made, to adapt device parameters such as rotation, zooming, scrolling, volume, contrast, brightness or sound optimizing parameters, or to select a user from a plurality of users operating their own input devices (20). The devices (1) may further comprise displays (2), with the light-guiding layers (15) comprising inner sides for guiding light arriving at the inner sides and originating from the displays (2) to the outer sides.
摘要:
This invention relates to a display device (1), comprising a display panel (2) having a layer of electro-optical material (4), a first light-transmissive substrate (5) provided with electrodes (7) in an area of pixels arranged in rows and columns, a second light transmissive substrate (6), said layer of electro-optical material (4) being sandwiched between said first and second layer (5, 6), and an illumination system (3), being arranged on a side of the second substrate (6) being remote from said layer of electro-optical material (4), the illumination system comprising an optical waveguide (14) of an optically transparent material, having an exit face (15) facing said display panel (2). According to the invention, the illumination system (3) further comprises a matrix-addressable light-management member (27).