Radiant Opto-Electronics Corporation

An optical component includes a transparent substrate, a first volume grating and a second volume grating disposed on the transparent substrate. The transparent substrate is located between the first volume grating and the second volume grating. The first volume grating has a plurality of first diffraction elements arranged in rectangular array, while the second volume grating has a plurality of second diffraction elements arranged in rectangular array. In addition, the spacing between two adjacent first diffraction elements is larger than the spacing between two adjacent second diffraction elements.

A backlight module comprises an upper and a lower backlight unit. The upper unit includes an upper light source and a substantially rectangular upper light guide plate with a first side edge along a first axis and a second side edge along a second axis which is non-parallel to the first axis. The upper light source is positioned adjacent to the second side edge and extends along the second axis, directing light primarily along the first axis within the light guide plate. When executing a side viewing execution step, an upper backlight unit and a lower backlight unit are activated to form the side viewing mode. When executing a narrow viewing execution step, the upper backlight unit is turned off and the lower backlight unit is activated to form the narrow viewing mode. The invention also provides a display device including the backlight module.

A frame structure includes an inner frame and a plurality of outer frames combined with the inner frame. The inner frame has at least one first joint member disposed on its outer surface, and the first joint member extends at least along a first direction. The outer frames are detachably combined with the inner frame along the first direction, so that the inner frame is surrounded by the outer frames. Each of the outer frames has at least one second joint member disposed on its inner surface. Each of the outer frames is combined with the inner frame through the cooperation between the second joint member and the first joint member of the inner frame in the first direction. Assembling the inner frame directly with the outer frames can reduce the number of assembly parts and improve the convenience of assembly and rework. The invention also provides a backlight module and a display device including the frame structure.

A backlight module comprises a light guide plate, a light source, a first optical film, and two second optical films. The first optical film is positioned toward the light emitting surface of the light guide plate and includes a body with multiple parallel prisms extending towards the light emitting surface and multiple optical structures positioned on the body and facing away from the light guide plate. Each of the second optical films has multiple parallel strips facing away from the first optical film. The direction of the strips on one of the second optical films being different from that on the other second optical film. This invention also provides a display device with the backlight module.

A cushion member has a lower portion and a side portion extending from the base portion, and the lower portion abuts against a side wall of a backlight module, and a light guide plate is mounted on the cushion member. A display device is provided and includes the aforementioned backlight module, using the cushion member to support the light guide plate.

A backlight module comprises a light guide plate, a light source, a first optical film, and two second optical films. The first optical film is positioned toward the light emitting surface of the light guide plate and includes a body with multiple parallel prisms extending towards the light emitting surface and multiple optical structures positioned on the body and facing away from the light guide plate. Each of the second optical films has multiple parallel strips facing away from the first optical film. The direction of the strips on one of the second optical films being different from that on the other second optical film. This invention also provides a display device with the backlight module.

A backlight control circuit includes a power supply circuit, a local dimming circuit, a backlight driving circuit, and a supply voltage adjustment circuit. The power supply circuit is used to output the power supply voltage to a backlight module. The backlight module has multiple dimming zones, and each dimming zone has light emitting diodes (LEDs). The local dimming circuit is used to generate a local dimming signal according to image data and a configuration of the dimming zones. The backlight driving circuit is used to generate backlight driving signals to the dimming zones of the backlight module according to the local dimming signal. The supply voltage adjustment circuit is used to generate a first supply voltage adjustment signal to the power supply circuit for adjusting the power supply voltage based on the local dimming signal and a characteristic data of each LED in the dimming zones.

A backlight module comprising an upper backlight unit, and a lower backlight unit positioned beneath the upper backlight unit. The upper backlight unit includes an upper light source, an upper light guide plate for receiving light emitted from the upper light source, and a first prism sheet located on the light-emitting side of the upper light guide plate. The first prism sheet includes multiple first prisms arranged along a first direction, where the first prisms extend along a second direction, and their tips are oriented towards the upper light guide plate. The upper light source includes multiple light-emitting elements arranged along the second direction. When both the upper and lower backlight units are turned on, it operates in a wide viewing mode, and when the upper backlight unit is turned on while the lower backlight unit is turned off, it operates in a narrow viewing mode, thereby providing a switching function between the wide viewing angle mode and the narrow viewing angle mode for the backlight module. The invention also provides a display device including the backlight module.

A backlight module includes a light source, an optical film, and a light control film. The light control film has a first reference surface and a plurality of first optical structures disposed on the first reference surface. Each of the first optical structures has a first optical surface and a second optical surface. A first included angle is formed between the first optical surface and the first reference surface. A second included angle is formed between the second optical surface and the first reference surface. The first included angle is an acute angle and is smaller than the second included angle. Thereby, the light can be deflected to one side and the light output of the other side can be suppressed. This invention also provides a display device including the backlight module.