53results about How to "Eliminate uneven brightness" patented technology

The light guide plate 32 has a light receiving portion 36 on one side thereof to receive light emitted by the LED 24 and a flexible light guide body 35 for transforming the light received by the light receiving portion 36 into planar light. The light guide body 35 is arranged along the liquid crystal panel 23 and has a plurality of light scattering portions 30 arranged on an outer surface thereof in a propagation direction of light emitted by the LED 24. Since the light guide plate 32 comprises a flexible member and thus can be arranged in a curved shape conforming to the liquid crystal panel 23 having a curved surface portion, the curved surface portion of the liquid crystal panel 23 can be illuminated uniformly. Further, the provision of the light scattering portions 30 can enhance a light reception efficiency and light emission efficiency even if the light guide plate 32 is thin.

The invention provides an endoscope having a scope that takes an image enlarged by driving a movable lens of an optical zoom mechanism by a CCD and displays an image of an object to be observed, wherein a multiplier multiplies RGB color signals by a coefficient set in view of light distribution of illumination light depending on focusing distances of the movable lens, thus eliminating uneven brightness resulting from varying light distribution depending on the focusing distances in enlargement photography. A red component cut filter for cutting a long wavelength side in a red band of the illumination light is provided in a light source unit to improve redness. Further, a coefficient for averaging a brightness signal for a predetermined number of pixels for each horizontal line is calculated, and this coefficient calculation may eliminate unevenness.

After a look-up table applies y correction to each of R, G, and B signals, a multiplier multiplies a y corrected signal by a gain. An adder adds an offset to an output of the multiplier and supplies a resultant gain/offset corrected signal to a display panel. Memories store entropy coded correction data, which can be expanded by corresponding expansion circuits and supplied to the multiplier and the adder, respectively.

In order to control light emission of light emitting diodes, current dividing circuits are used to supply currents of a substantially fixed level to all lines. Light emitting diodes are arranged in groups of a predetermined number of LEDs in series, and sets of the light emitting diodes connected to the first line and sets of the light emitting diodes connected to the second line are laid out on the same straight line so as to form a single row. Substrates with these formed thereon are arranged adjacent to each other in the direction of the rows, so that sets of the light emitting diodes connected to the first line and sets of the light emitting diodes connected to the second line are arranged alternately. With this configuration, it is possible to provide a backlight device with a plurality of LED arrays arranged thereon, which can uniformly illuminate the entire screen with light from the LED arrays.

The invention discloses a pixel circuit, driving method, organic light emitting display panel and display device. The pixel circuit comprises a threshold compensation module, a capacitor module, a light emitting control module, a data writing module, a driving module and a light emitting module; the threshold compensation module transmits a reference signal provided by a data signal terminal to afirst node under control of a reset signal terminal, transmits a initialization signal provided by an initial signal terminal to the light emitting control module, connects the light emitting controlmodule, the driving module and a secondary node, and stores the threshold voltage of the driving module through the capacitor module; the data writing module transmits a data signal provided by the data signal terminal to the first node under control of a scanning signal terminal, and stores voltage of the data signal through the capacitor module; and the light emitting control module connects thedriving module and the light emitting module under control of a light emitting control signal terminal to enable the light emitting module to emit light. The problems of threshold voltage shift and voltage drop of a power supply are solved by the five modules through cooperation.

Even when using a light source reflector having a strong direct reflection tendency in an edge light type planar light source device, the light coming from the primary light source into the light incident end surface and introduced into the light guide is not shielded, the entire luminance lowering is not caused, generation of dark-lines is not caused by shielding of the light to be guided, generation of the bright-lines in the vicinity of light incident end surface is prevented for a long period of time, and generation of sudden local luminance change is prevented. In the light guide (3) using a primary light source (1) in combination with a light source reflector (2), a first light absorption band (36) and a second light absorption band (136) extending along the light incident end surface (31) are arranged in parallel on the light emitting surface (33). The first light absorption band (36) has a width of 50 [mu]m to 800 [mu]m. The first light absorption band (36) has the side edge in the vicinity of the light incident end surface (31) is at a distance of 300 [mu]m or less from the light incident end surface. The second light absorption band (136) has the side edge in the vicinity of the light incident end surface (31) is at a distance of 500 [mu]m to 3000 [mu]m from the light incident end surface.

Provided is an optical element which has high light extracting efficiency and eliminates luminance nonuniformity in two orthogonally intersecting directions in backlight wherein dot-like light sources are arranged in matrix. An optical element (3) is provided with a light transmitting optical sheet (20) and a light diffusing sheet (10). The optical sheet (20) has a light incoming surface (20a) and a light outgoing surface (20b). At least on the light incoming surface (20a) or the light outgoing surface (20b), a microlens array (21) wherein a plurality of microlenses (22), each of which is formed in a protruding shape or a recessed shape, are arranged at a pitch less than 10[mu]m in a cycle and in matrix is formed. The light diffusing sheet (10) is arranged on the side of the light outgoing surface (20b) of the optical sheet (20). The light diffusing sheet (10) diffuses incoming light by refracting the incoming light.

Disclosed herein is a display device including a pixel array configured to include pixel circuits arranged in a matrix having a light emitting element, driving transistor, sampling transistor, and hold capacitor. The display device further includes a signal selector, driving control scanner, and writing scanner. The signal selector alternately carries out supply of a video signal voltage in order from a beginning line to an end line in a unit and supply of a video signal voltage in order from an end line to a beginning line in a unit. The writing scanner outputs the pulse to the writing control lines in such a way that input of a video signal voltage in order from a beginning line to an end line in a unit and input of a video signal voltage in order from an end line to a beginning line in a unit are alternately carried out.

A liquid crystal display device is provided in which, even when divided light guide plate blocks are thermally expanded or contracted as a result of a temperature change, the generation of clearances and mechanical deformations between such divided light guide plate blocks is prevented, making it possible to reduce the brightness unevenness of the liquid crystal display device. To realize the above feature, light guide plate blocks are arranged such that one or two of them are arranged in each horizontal row with only an upper side of each light guide plate block fixed to a chassis and, furthermore, such that the upper side fixed to the chassis of each light guide plate block is based on a center in the horizontal direction of the liquid crystal display panel so as to reduce the effects of thermal expansion and contraction of each light guide plate block.

A display device includes: a pixel array including pixel circuits arranged in a matrix state, in which each pixel circuit has a light emitting element, a drive transistor, and a storage capacitor storing a threshold voltage of the drive transistor and an inputted signal value; a threshold correction operation means for performing a threshold correction operation plural times, which allows the storage capacitor to store the threshold voltage of the drive transistor before giving the signal value to the storage capacitor; and a cut-off control means for allowing the drive transistor to be cut off in at least one after-correction period and for allowing the drive transistor not to be cut off in at least one after-correction period in plural after-correction periods which are periods after the plural threshold correction operation periods.

The invention discloses a pixel structure, and particularly relates to a pixel structure of a horizontal electric field liquid crystal display. The pixel structure comprises a transistor array substrate and a color filter substrate, wherein the transistor array substrate and the color filter substrate are oppositely arranged. The transistor array substrate comprises a pixel electrode and a shared electrode, wherein the pixel electrode comprises a first part and a plurality of second parts, and the second parts extend from the first part. The shared electrode comprises a first part and a plurality of second parts, wherein the second parts extend from the first part. The second parts of the shared electrode and the second parts of the pixel electrode are alternatively arranged on the substrates in parallel. The color filter substrate comprises a shielding electrode, and the shielding electrode shields the area from the front ends of the second parts of the shared electrode to the pixel electrode and the area from the front ends of the second parts of the pixel electrode to the shared electrode.

The invention provides a pixel compensation circuit, a driving method thereof and a display device, and relates to the technical field of display. The compensation circuit can eliminate the uneven brightness phenomenon of a light-emitting element caused by Vth drift, thereby improving the display effect. The circuit includes: the light-emitting element; a driving module which is electrically connected with a first node, a second node and a third node; reset modules, wherein the first reset module is electrically connected with a reset signal line, the first node and an initial signal line, andthe second reset module is electrically connected with the reset signal line, the second node and the third node; an input control module which is electrically connected with a scanning signal line,a data signal line and a fourth node; and light-emitting control modules, wherein the first light-emitting control module is electrically connected with a light-emitting control signal line, a secondpower signal line and the third node, the second light-emitting control module is electrically connected with the light-emitting control signal line, the first node and the fourth node, and the firstnode is electrically connected with an anode. The invention is suitable for manufacturing the pixel compensation circuit.