Patent ID: 11860397
Assignee: PRIMAX ELECTRONICS LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G | IPC F

Claim 11:
12. A light guide module for a touch pad, the light guide module comprising:
a base plate;
a pattern layer located over a covering layer, wherein the pattern layer comprises plural text regions and an opaque region;
a light guide plate arranged between the base plate and the pattern layer, wherein the light guide plate comprises plural first light-guiding dot regions and plural second light-guiding dot regions, wherein the plural first light-guiding dot regions are aligned with the corresponding text regions of the pattern layer, and the plural second light-guiding dot regions are aligned with the opaque region of the pattern layer;
a covering layer arranged between the pattern layer and the light guide plate, wherein the light guide plate is covered by the covering layer, and the covering layer comprises plural non-shading regions, plural separation regions and plural shading regions, wherein the plural non-shading regions of the covering layer are aligned with the corresponding first light-guiding dot regions of the light guide plate, and the plural shading region of the covering layer are aligned with the corresponding second light-guiding dot regions of the light guide plate; and
a light-emitting element installed on a lateral edge part of the light guide plate,
wherein the plural first light-guiding dot regions of the light guide plate are exposed to the corresponding non-shading regions of the covering layer and the corresponding text regions of the pattern layer,
wherein the plural second light-guiding dot regions of the light guide plate are covered and shaded by the corresponding shading regions of the covering layer, so that the plural second light-guiding dot regions are not exposed to the opaque region of the pattern layer.