42results about How to "Improve Bright Room Contrast" patented technology

A plasma display panel capable of improving a black area ratio and a bright room contrast and reducing a reflected luminance by coloring different layers in the plasma display panel is provided. The plasma display panel includes: a rear substrate; a front substrate colored with a first chromatic color and facing the rear substrate; barrier ribs disposed between the front and rear substrates and defining discharge cells; address electrodes extending in a first direction on the rear substrate and corresponding to the discharge cells; phosphor layers disposed in the discharge cells, wherein at least one of the phosphor layers is colored with a second chromatic color; display electrodes extending in a second direction crossing the first direction on the front substrate and corresponding to the discharge cells; and a front dielectric layer disposed on the front substrate to cover the display electrodes and colored with a third chromatic color.

A plasma display panel is provided. The plasma display panel includes front and rear substrates facing each other to form a discharge space therebetween, a plurality of address electrodes provided in stripes on an upper surface of the rear substrate, a first dielectric layer provided to cover the address electrodes on the upper surface of the rear substrate, and partitions provided on a upper surface of the first dielectric layer to partition the discharge space. On a lower surface of the front substrate are a plurality of second dielectric layers extending in a direction perpendicular to the address electrodes, each of the second dielectric layers protruding from a lower surface of the front substrate, both sides of each of the second dielectric layers being concavely curved, first and second sustaining electrodes provided to be slanted to face each other on both sides of each of the second dielectric layers, and a third dielectric layer provided on a lower surface of the second dielectric layers to cover the first and second sustaining electrodes.

A plasma display panel. A first substrate and a second substrate are provided opposing one another with a predetermined gap therebetween. Address electrodes are formed on the second substrate. Barrier ribs are mounted between the first substrate and the second substrate, the barrier ribs defining a plurality of discharge cells and a plurality of non-discharge regions. Phosphor layers are formed within each of the discharge cells. Discharge sustain electrodes are formed on the first substrate. The non-discharge regions are formed in areas encompassed by discharge cell abscissas and ordinates that pass through centers of each of the discharge cells. Also, external light absorbing members are formed between the second substrate and the barrier ribs layer at areas corresponding to locations of the non-discharge regions.

An LED display apparatus includes a plurality of light emitting diodes; a first microlens array disposed at an upper side of the plurality of light emitting diodes, the first microlens array comprising a plurality of first microlenses which corresponds to the plurality of light emitting diodes one-to-one and is configured to combine light received from the plurality of light emitting diodes into light bundles; and a second microlens array disposed at an upper side of the first microlens array, the second microlens array comprising a plurality of second microlenses, a number of which is larger than a number of the first microlenses included in the first microlens array, each of the plurality of second microlenses configured to cause a convergence of light that has propagated through the first microlens array.

A display panel is disclosed. The display panel includes an upper substrate through which light used for an image display passes and a plurality of light guides collecting and emitting the light transmitted through the upper substrate. The display panel may further include anti-reflective part, EMI shielding part, infrared filtering part or glass substrate to increase the bright room contrast or to improve the image displayed by the display panel.

A phosphor paste composition, a manufacturing method thereof, a plasma display panel using the same, and a manufacturing method thereof, which are capable of achieving an improvement in bright room contrast and realizing a highly definite display, are disclosed.

A plasma display device is provided. The plasma display device includes a plasma display panel (PDP) and an external light shield sheet which absorbs external light incident upon the PDP. The external light shield sheet includes a base unit and a plurality of pattern units which are formed in the base unit. Each of the pattern units contains 2-10 weight % of light absorption particles having a size of 1 μm or less. Since the external light shield sheet which can absorb and shield as much external light as possible is disposed at the front of the PDP, the plasma display device can effectively realize black images and improve bright room contrast.

A film adhered on a display panel includes a black layer for preventing an external light from entering into the display panel, and a reflective layer for preventing light emitted from the display panel from being absorbed in the black layer. The film minimizes the influence of an external light and improves transmittance, thereby providing a user with a good-quality picture.

The invention provides a filter membrane of a plasma display panel and a preparation method of the filter membrane and relates to a filter membrane technique for improving a contrast of a display. The filter membrane solves problems that such traditional filter membrane has the disadvantages of many membrane layers, low transmittance of visible lights, complex processing, low efficiency and high cost. The filter membrane comprises a substrate, wherein an anti-reflective membrane layer or a hardening membrane layer is arranged on one side of the substrate; the substrate is provided with stripe-patterned grooves, in which black fillers are arranged; Color-PSA adhesive membrane layers are arranged outside the grooves; the preparation method of the filter membrane comprises the following steps of: manufacturing the anti-reflective membrane layer or the hardening membrane layer on one side of the substrate, manufacturing stripe-patterned grooves and black fillers on one side of the substrate and manufacturing the Color-PSA adhesive membrane layers outside the grooves. The filter membrane provided by the invention has the advantages of less membrane layers, light weight, capability of high transmittance and light-room contrast, low cost, simple preparation method, high qualified rate of filter membranes and high production efficiency. The filter membrane provided by the invention is mainly applied to plasma display panels.

A filter includes a base film having a first surface and a second surface, and a plurality of first color patterns on the first surface of the base film, the first color patterns having a stripe pattern with first predetermined intervals therebetween.

Provided is a plasma display panel that improves a black area ratio and a bright room contrast. The plasma display panel includes: front and rear substrates facing each other; barrier ribs disposed between the front and rear substrates to define discharge cells; address electrodes which extend in a first direction on the rear substrate and correspond to the discharge cells; a plurality of phosphor layers disposed in the discharge cells, wherein at least one of the phosphor layers is colored with a first chromatic color; display electrodes which extend in a second direction crossing the first direction on the front substrate and correspond to the discharge cells; and a front dielectric layer which is disposed on the front substrate to cover the display electrodes. The front dielectric layer is colored with a second chromatic color. The barrier ribs may be colored with a third chromatic color.

A direct current plasma display panel (DC-PDP) includes a first substrate and a second substrate facing each other, discharge cells between the first substrate and the second substrate, first and second electrodes disposed in each of the discharge cells, first conductive silicon layers contacting the first electrodes, first oxidized porous silicon layers contacting the first conductive silicon layers, second conductive silicon layers contacting the second electrodes, second oxidized porous silicon layers contacting the second conductive silicon layers, phosphor layers arranged in the discharge cells, and a discharge gas disposed in the discharge cells.

A plasma display panel that may reduce an external light reflection ratio and improve a bright room contrast includes first and second substrates parallel to each other, a plurality of sustain electrodes disposed on the first substrate and a plurality of main electrode portions, a first dielectric layer covering the sustain electrodes, barrier ribs interposed between the first and the second substrates and partitioning discharge cells along with the sustain electrodes, address electrodes disposed on the second substrate and crossing the sustain electrodes, a second dielectric layer covering the address electrodes, luminescent layers disposed in the discharge cells, and a discharge gas in the discharge cells, in which the main electrode portions may include first electrode layers and second electrode layers which may be adhered to the first electrode layers, and the second electrode layers having widths less than or equal to widths of the first electrode layers.