403results about How to "Avoid uneven brightness" patented technology

An image display capable of multilevel display and having a minimal pixel-to-pixel display characteristic variation. The image display having a display area of a plurality of pixels and a signal line for feeding a display signal voltage to the pixels, comprises, in at least one of the plurality of pixels: a memory for storing the display signal voltage entered from the signal line to the pixel; a pixel turn-on period decision section for determining an ON period and an OFF period for an image output in the pixel according to the display signal voltage; and a pixel driver for repeating an ON operation of the image output a plurality of times in one frame.

A display device prevents luminance unevenness that occurs in the case of inversion driving being performed, and performs high quality image display, while selectively scanning two lines of picture elements constituting a single pixel using a single gate wiring, as in the case of multi-primary color image display. The display device includes a display element including a pixel constituted by a plurality of picture elements disposed in two lines in a longitudinal direction and two or more columns in a lateral direction, a gate wiring common to the plurality of picture elements, and a source wiring that is arranged perpendicular or substantially perpendicular to the gate wiring and to perform image display using inversion driving in which an image display signal is provided to the picture elements connected to the gate wiring which is sequentially selected, at a different polarity than a polarity of an immediately previous frame, and an array of the picture elements in the pixel is determined so as to compensate for a change in luminance following the change in the effective value relative to the image display signal of the picture elements belonging to one line.

A display unit capable of preventing breaking of a second electrode and decreasing a leakage current through an organic layer is provided. The display unit includes a plurality of organic light emitting devices over a flat substrate. Each of the plurality of organic light emitting devices has a first electrode, an insulating film having an aperture correspondingly to the first electrode, an organic layer formed at least on the first electrode in the aperture and composed of a plurality of layers including a light emitting layer, and a second electrode sequentially. The insulating film has a low taper section having a tilt angle formed by a side face of the aperture and a flat face of the substrate that is smaller than a tilt angle of the other section of a circumference of the aperture in part of the circumference of the aperture.

An optical film 10 has a transparent base film 11 made of polyethylene terephthalate (PET), a prism made of photo-curing resin such as acryl modified epoxy on an incident surface 12 that is one face of the base film 11, and a hologram similarly made of photo-curing resin on an exit surface 13 opposing the incident surface 12. The prism has grooves or ridges each having a substantially triangular cross section to totally reflect incident light so as to bend the light into a direction perpendicular to the exit surface 13. The hologram anisotropically diffuses light exiting from the exit surface 13, to improve brightness.

A display device and a driving method thereof includes categorizing red-color, green-color, and blue-color image signals as belonging to one of first and second signal regions, detecting if the image signals have more signals belonging to the first signal region than the second signal region or if the image signals have more signals belonging to the second signal region than the first signal region, driving an image display portion in a first manner if the image signals are detected to have more signals belonging to the first signal region than the second signal region, and driving the image display portion in a second manner if the image signals are detected to have more signals belonging to the second signal region than the first signal region, the image display portion including a plurality of pixels, each of the pixels having red-color, green-color, blue-color, and white-color sub-pixels.

There are provided a light source device and a display device which do not generate a wrinkle on an optical sheet even if the optical sheet is held on an LED substrate. A reflection sheet is disposed between each of head portions possessed by a rivet, a positioning rivet and a support rivet and one surface of an LED substrate where an LED is mounted, and a gap in a direction of a sheet thickness is provided between the head portion of each of the rivets and the reflection sheet. In the case in which a sudden thermal change is caused, therefore, the reflection sheet expands or contracts between the head portion of each of the rivets and the reflection sheet so that the wrinkle can be prevented from being generated over the reflection sheet.

A method of driving a pixel circuit includes initializing a driving transistor and a storage capacitor by simultaneously applying an initialization voltage and a first power voltage to a gate electrode of the driving transistor and the storage capacitor, respectively, diode-coupling the driving transistor, applying a data voltage to the storage capacitor, applying the data voltage to the gate electrode of the driving transistor by a coupling of a compensation capacitor coupled between the gate electrode of the driving transistor and the storage capacitor, and applying a current corresponding to the first power voltage and the data voltage to an organic light emitting diode that is coupled to the driving transistor.

A light-emitting device (10) includes: a light-emitting element (1); and a light flux controlling member (2) for controlling light emitted from the light-emitting element (1), the light flux controlling member (2) has (i) a light-incoming surface (2a) which the light emitted from the light-emitting element (1) enters and (ii) a light-outgoing surface (2b), and the following equation (1) is satisfied where r is a length, from a light axis Z of the light-emitting device (10), of a plane that is provided at a certain distance from the light flux controlling member (2) in a direction parallel to the light axis Z so as to be perpendicular to the light axis Z, φ₁ is an angle between the light emitted from the light-emitting element (1) and the light axis, P(φ₁) is a light distribution property of the light-emitting element (1). This provides a light-emitting device that scatters light without generating uneven brightness on a liquid crystal display panel, reduces a reflectance caused by the Fresnel's reflection, and has an improved scattering ability.

A liquid crystal display device includes: a liquid crystal panel; a backlight unit under the liquid crystal panel, the backlight unit including a light emitting diode (LED) assembly supplying a light and a light guide plate transmitting the light from the LED assembly to the liquid crystal panel; a main frame surrounding the backlight unit, the main frame including a flat portion for supporting the LED assembly and a guide wall for guiding the LED assembly, the guide wall including at least one concave portion; and a light shielding tape on the guide wall and the LED assembly, the light shielding tape including at least one open portion corresponding to the at least one concave portion.

A liquid crystal display device is provided. The liquid crystal display device includes a light-shielding member to prevent light irradiated upward from a light-emitting surface of a plurality of light-emitting diodes from being incident on a lower edge of an incident surface of a light-guide portion. As a result, a bezel surrounding a liquid crystal display panel may be made thinner, and a bright line defect, hot spot, may be prevented.

A direct type backlight unit having liftable frame structure comprises a housing, an upper frame and a plurality of lamps, wherein the plurality of lamps disposed on a cavity defined by the housing and at least one has a foggy region; the upper frame is configured to accommodate a plurality of optical films and a liquid crystal panel and has two clip members for engaging with two connection hole of the housing such that the upper frame can be easily fixed on the housing. A plurality of lamp connection units are disposed within the cavity and each comprises a conductive clamp member for clamping the conductive electrode of the lamp, thereby facilitating the replacement of the lamps.

The invention provides a pixel circuit and a driving method therefor, and an organic light emitting display. The positive electrode of an organic light emitting diode is initialized by the pixel circuit through a first thin film transistor and a second thin film transistor; the gate electrode and the drain electrode of a sixth thin film transistor, taken as the driving element, are initialized through the first thin film transistor and a third thin film transistor; meanwhile, the overshoot current generated in the initializing process is eliminated through a seventh thin film transistor, so that the service life of the organic light emitting diode and the sixth thin film transistor is prolonged; and in addition, the current output by the sixth thin film transistor which is taken as the driving element is unrelated to the threshold value voltage of the sixth thin film transistor and the impedance of the power supply routing wires, so that uneven luminance caused by the threshold value voltage deviation of the thin film transistor and the difference of the impedance of the power supply routing wires can be avoided, and the display quality of the organic light emitting display is further improved.

The present invention relates to a display device, a correction system, a forming device, a determining device and method. Part of pixels contained in a correction region including a nonuniform brightness region or the nonuniform brightness region and peripheral region thereof are selected as adjustment correction pixels, and gray level value correction amount of the adjustment correction pixel is different from that of the pixels apart from the adjustment correction pixels in the correction region, so as to only correct by a brightness value less than one gray level of display image data (or a brightness value equivalent to a gray level value of the display image data which fractional part is not zero), namely, the brightness values of all pixels in the correction region are all corrected. Thereby, the nonuniform brightness of the display device can be corrected exactly.

An organic light emitting display device includes a pixel unit that displays an image corresponding to an amount of driving current flowing from a first power supply to a second power supply, wherein the pixel unit includes a pixel that is formed at an intersection portion of a scan line transferring a scan signal and a data line transferring a data signal. The pixel electrode further includes organic light emitting diodes emitting light according to the driving current, and controlling the magnitude of the driving current by controlling a voltage of the data signal corresponding to voltages from the first power supply and the second power supply and a voltage formed on the organic light emitting diode; a first wire transferring the first power to the pixel in a first direction; and a second wire transferring the first power to the pixel in a second direction, wherein the first wire and the second wire are formed to have a thickness thicker in the mid-portion of the pixel unit and is thinner in an outer-portion of the pixel unit, and a method of manufacturing the same.

A planar light source device of the present invention includes a light guide plate and a plurality of light-emitting diodes. The light guide plate includes a plurality of plate-form light guide members whose side surfaces are formed in a serrated shape. The serrated-shaped side surfaces of adjacent light guide members are connected in a planar direction so as to be engaged with each other. The plurality of light-emitting diodes emit light toward each of the light guide members. With this configuration, it is possible to securely prevent irregularity of brightness, when changing the luminance in the display screen in unit of blocks.