Keyboard
AssigneeLite-On Technology Corporation
InventorYi-Wen Chen
Life of this patent
Estimating the term…
Abstract
A keyboard includes a backlight module, a base plate, a membrane circuit disposed on the base plate, and a plurality of key structures disposed on the membrane circuit. The backlight module includes a light source, a reflective layer, a light guide layer, and a shielding layer. The light source is disposed corresponding to the light guide layer. The light guide layer is located between the shielding layer and the reflective layer. The light guide layer has a through-hole. The shielding layer and the reflective layer are in contact with each other in the through-hole of the light guide layer. The base plate is disposed on the shielding layer. The base plate has a positioning portion disposed corresponding to the through-hole of the light guide layer, which protrudes toward the reflective layer or the membrane circuit.
Claims18
A keyboard, comprising:
- a backlight module, comprising a light source, a reflective layer, a light guide layer, and a shielding layer, wherein the light source is disposed corresponding to the light guide layer and covered by the shielding layer, and the light guide layer is located between the shielding layer and the reflective layer, wherein the light guide layer has a through-hole, and the shielding layer and the reflective layer are in contact with each other in the through-hole of the light guide layer;
- a base plate, disposed on the shielding layer;
- a membrane circuit, disposed on the base plate, wherein the base plate has a positioning portion disposed corresponding to the through-hole of the light guide layer, and the positioning portion protrudes toward the reflective layer or the membrane circuit;
- and
- a plurality of key structures, disposed on the membrane circuit.
A keyboard, comprising:
- a backlight module, comprising a light source, a reflective layer, a light guide layer, and a shielding layer, wherein the light guide layer is disposed on the reflective layer, the shielding layer is disposed on the light guide layer, and the light source is disposed corresponding to the light guide layer and covered by the shielding layer;
- a base plate, disposed on the shielding layer;
- a membrane circuit, disposed on the base plate, wherein the base plate has a positioning portion disposed corresponding to a through-hole of the light guide layer, the positioning portion protrudes toward the membrane circuit, and the positioning portion has a recess facing the backlight module;
- and
- a plurality of key structures, disposed on the membrane circuit.
A keyboard, comprising:
- a backlight module, comprising:
- a reflective layer, having a first opening;
- a light guide layer, being disposed on the reflective layer and having a second opening larger than the first opening;
- a shielding layer, being disposed on the light guide layer and having a third opening;
- and
- a light source, being disposed corresponding to the light guide layer;
- a base plate on the backlight module, wherein the base plate has a positioning portion corresponding to the first, second and third openings, and the reflective layer or the shielding layer has an extension portion protruding from the second opening to a position corresponding to the positioning portion;
- and
- a plurality of key structures on the base plate.
Dependencies are inferred from the claim text.