Patent ID: 8760394

Claim:
A portable electronic device, comprising: a main body; a physical key module, assembled to the main body, having a display surface, comprising: a first icon unit, having a first light-guiding film and at least a first icon formed on the first light-guiding film; and a second icon unit, having a second light-guiding film and at least a second icon formed on the second light-guiding film, wherein the second light-guiding film and the second icon thereon are stacked atop the first light-guiding film and the first icon thereon; and a control module, electrically connected to the physical key module, for activating one of the icon units so that an icon of the activated icon unit is displayed on the display surface, wherein when the main body is in a first operating state, the control module activates the first icon unit and disables the second icon unit, so that the first icon is displayed on the display surface, and when the main body is in a second operating state, the control module disables the first icon unit and activates the second icon unit, so that the second icon is displayed on the display surface, wherein the first icon unit comprises a first light source electrically connected to the control module and a first light-shielding sheet disposed on the first light-guiding film, the first light-guiding film is disposed aside the first light source, wherein when the main body is in the first operating state, the control module activates the first light source, and when the main body is in the second operating state, the control module disables the first light source, wherein the first light-shielding sheet has a first light-pervious region, the first light-pervious region corresponds to the first icon, a profile of the first light-pervious region is complied with a profile of the first icon, and an area of the first light-pervious region is smaller than or equal to an area of the first icon, wherein the second icon unit comprises a second light source electrically connected to the control module and a second light-shielding sheet disposed on the second light-guiding film, the second light guiding film is disposed aside the second light source, wherein when the main body is in the second operating state, the control module activates the second light source, and when the main body is in the first operating state, the control module disables the second light source, and wherein the second light-shielding sheet has a second light-pervious region, the second light-pervious region corresponds to the second icon and the first icon, and an area of the second light-pervious region is greater than or equal to an area of the first icon, and is greater than or equal to an area of the second icon.