A backlight assembly includes a light guide plate (LGP) having a stepped portion formed at a corner of the LGP, an optical sheet disposed over the LGP and a receiving container receiving the LGP and the optical sheet. The receiving container includes a bottom plate, first through fourth sidewalls and a first LGP fixing portion. The second sidewall is adjacent to the first sidewall. The third sidewall faces the first sidewall. The fourth sidewall faces the second sidewall. The first through fourth sidewalls are extended upwardly from edge portions of the bottom plate. The first LGP fixing portion is formed at the first sidewall such that the LGP fixing portion corresponds to the stepped portion of the LGP. Therefore, a display device is easily assembled. Furthermore, a defilement that may occur during an assembling process may be reduced to enhance productivity.

Backlight assembly and display device having the same

A light emitting device includes a film lightguide. The lightguide includes a lightguide region and an array of coupling lightguides continuous with the lightguide region, each terminating in a bounding edge and folded such that the bounding edges define a light input surface. A light source emits light into the light input surface. Light propagates within each coupling lightguide to the lightguide region, with light from each coupling lightguide combining with light from one or more other coupling lightguides and totally internally reflecting within the lightguide region. One or more light extraction features frustrate the totally internally reflected light such that light exits the lightguide in a light emitting region. Surface relief features on a surface of a low contact area cover are adjacent to a region of the lightguide with one or more of the surface relief features contacting the lightguide. A method of producing a device is disclosed.

Illumination device comprising a film-based lightguide

A display 1201 includes an array of light modulators 1208 that define a display plane, a light guide 1204 and front- and rear-facing reflective surfaces. The light guide 1204 includes a plurality of geometric light redirectors 1206, and at least 50% of the light guide's rear surface is parallel to the display plane. The rear-facing reflective surface is parallel to the display plane and includes a plurality of apertures.

Display apparatus with optical cavities

The invention relates to methods and apparatus for forming images on a display utilizing a control matrix to control the movement of MEMs-based light modulators.

Display methods and apparatus

Circuits for controlling display apparatus

A diffusing board which can suppress moire fringes, color flickering and screen brightness deterioration on a screen of a liquid crystal display device. On the surface of a transparent board (83), a pattern wherein substantially rectangular shapes are arranged in lattice by using a synthesized pattern (86) is formed. The synthesized pattern (86) is provided by synthesizing a plurality of first uneven patterns (84) having a linear shape which is long in one direction, and a plurality of concave lens shaped second uneven patterns (85) arranged at random.

Diffusing Board and Surface Light Source Device

On a light guide plate ( 32 ), a prism sheet ( 36 ), an uneven diffuser plate ( 37 ) and a correcting optical sheet ( 38 ) are placed one over another. Light outputted from the light guide plate ( 32 ) in a direction substantially parallel to a light outputting surface ( 45 ) is bent to a direction substantially vertical to the light outputting surface ( 45 ) by the prism sheet ( 36 ). Light which passed through the prism sheet ( 36 ) and has a long directivity characteristic in an r axis direction is converted into light having a substantially circular directivity characteristic by passing through the uneven diffuser plate ( 37 ). Furthermore, the light which passed through the uneven diffuser plate ( 37 ) and has the substantially circular directivity characteristic is converted into light having a directivity characteristic closer to a perfect circle by the correcting optical sheet ( 38 ). The correcting optical sheet ( 38 ) is formed of a pattern having many polyhedron shapes.

Diffuser plate and surface light source apparatus

PROBLEM TO BE SOLVED: To provide a diffusion plate which can suppress moire fringes and color flickering of the screen of a liquid crystal display device, and can reduce the luminance degrade of the screen. SOLUTION: On the surface of a transparent substrate 83, a pattern is formed where almost rectangular shapes are arranged in grid by using a synthetic pattern 86. The synthetic pattern 86 is made by synthesizing a plurality of first uneven patterns 84 having a linear shape long in one direction , and a plurality of second uneven patterns 85 of concave lens shape which are arranged at random. COPYRIGHT: (C)2006,JPO&NCIPI

Diffusion plate and surface light source device

On a light guide plate (32), a prism sheet (36), an uneven diffuser plate (37) and an optical sheet (38) for correction are placed one over another. Light outputted from the light guide plate (32) in a direction substantially parallel to a light outputting surface (45) is bent in a direction substantially vertical to the light outputting surface (45) by the prism sheet (36). Light which passed through a prism sheet (36) and has a long directional characteristic in an r axis direction is converted into light having a substantially circular directional characteristic, by passing through the uneven diffuser plate (37). Furthermore, the light passed through the uneven diffuser plate (37) passes through the optical sheet (38) for correction. The optical sheet (38) has diffusion patterns (54-58) having spherical lens shape, cylindrical lens shape and the like. The light passed through the optical sheet (38) is converted into light having a uniform directivity as a whole, and luminance nonuniformity and emission lines are reduced in the vicinity of a light emitting section (33).

Diffuser plate and planar light source apparatus

PROBLEM TO BE SOLVED: To improve luminance of the front face of a color semi-transmission type liquid crystal display device. SOLUTION: The color liquid crystal display device 31 consists of a color display part 32 and a surface light source device 33. The color display part 32 is produced by disposing an upper polarizing plate 35 and a lower polarizing plate 36, facing each other on the upper and lower faces of a liquid crystal display panel 34, respectively, and the liquid crystal display panel 34 has a semitransmission reflection part 37, a part of which is formed as a reflection part 37a to reflect the incident light and an other part of which is formed as a transmission part 37b to transmit the incident light. The surface light source device 33 consists of a light guide plate 38, a light-emitting part 39 disposed to face the entrance face of the light guide plate 38, a total reflection plate 41 disposed to face the lower face of the light guide plate 38, and a diffusion plate 40 with a small diffusion degree disposed to face the entrance face of the light guide plate 38.

Tetsuya Minobe

Papers

Diffusing Board and Surface Light Source Device

Diffuser plate and surface light source apparatus

Diffusion plate and surface light source device

Diffuser plate and planar light source apparatus

Liquid crystal display device and mobile information terminal device