Electronic device

• US 8,085,256 B2
• Filed: 04/24/2006
• Issued: 12/27/2011
• Est. Priority Date: 04/28/2005
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Sakamoto, Mayuko, Izumi, Yoshihiro, Katoh, Hiromi, Nagai, Tomoyuki
• Primary Examiner(s): Sherman, Stephen
• Application Number:
  US11/919,331
• Publication Number:
  US 20090135115A1
• Time in Patent Office: 2,073 Days
• Field of Search: 345/207, 345 76-104, 345/204, 349/104, 349/105, 349/110
• US Class Current: 345/207
• CPC Class Codes: G02F 1/1336 Illuminating devices
• CPC Class Codes: G02F 2201/086 UV absorbing
• CPC Class Codes: G02F 2201/58 Arrangements comprising a monitoring photodetector
• CPC Class Codes: G09G 2300/08 Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
• CPC Class Codes: G09G 2360/14 Detecting light within display terminals, e.g. using a single or a plurality of photosensors
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: H01L 27/12 the substrate being other than a semiconductor body, e.g. an insulating body

Abstract

An electronic device is provided which can appropriately adjust the brightness of a display apparatus in accordance with the lightness of visible light by preventing UV-light from being incident upon an optical sensor. An electronic device having, in a housing, a display apparatus (1) that includes an active matrix substrate (2) having a pixel array region (8) in which a plurality of pixels (5) are arranged and a display medium (4) provided in a gap between the active matrix substrate (2) and a counter substrate (3), includes an optical sensor (11) provided in a peripheral region (9) present in a periphery of the pixel array region (8) in the active matrix substrate (2) of a display apparatus (1), and a UV-light blocking member (70) that is provided in a portion covering the optical sensor (11) in the housing and transmits visible light and absorbs UV-light.

Claims

1. An electronic device including an active matrix substrate having a pixel array region in which a plurality of pixels are arranged and a display medium provided on the active matrix substrate, comprising:

an optical sensor provided in a peripheral region present in a periphery of the pixel array region in the active matrix substrate of the display apparatus; and

a UV-light blocking member that is provided in a portion covering the optical sensor, and that transmits visible light and absorbs UV-light, wherein

the UV-light blocking member has a substantially equal area to that of the active matrix substrate and covers both said pixel array region and said peripheral region, the electronic device further comprising

a touch panel stacked on the display apparatus, wherein

the touch panel includes the UV-light blocking member, and

the UV-light blocking member covers the pixel array region and the peripheral region, wherein

said touch panel includes a substrate that covers the pixel array region and the peripheral region, and the substrate is the UV-light blocking member.

2. The electronic device according to claim 1, wherein

the UV-light blocking member attenuates a transmittance of UV-light contained in ambient light to 50% or less.

3. The electronic device according to claim 1, wherein

the UV-light blocking member is an acrylic plate.

4. The electronic device according to claim 1, wherein

at least a part of a constituent member of the optical sensor is produced by the same process as that of a constituent member of the active element.

5. The electronic device according to claim 1, wherein

the optical sensor is formed on a principal plane of the active matrix substrate monolithically.

6. The electronic device according to claim 1, wherein

in the pixel array region of the active matrix substrate, a plurality of electrode wires, a plurality of active elements, an interlayer insulation film provided in an upper layer of the plurality of electrode wires and the plurality of active elements, and a plurality of pixel electrodes formed on the interlayer insulation film are provided, and

a transparent insulation layer made of the same material as that of the interlayer insulation film in the pixel array region is provided in an upper layer of the optical sensor.

7. The electronic device according to claim 6, wherein

the interlayer insulation film and the transparent insulation layer are formed by the same process.

8. The electronic device according to claim 6, further comprising

a transparent conductive layer made of the same material as that of the pixel electrode in an upper layer of the transparent insulation layer, wherein

the transparent conductive layer is insulated from the pixel electrode in the pixel array region, and is connected to a fixed potential.

9. The electronic device according to claim 8, wherein

the pixel electrode and the transparent conductive layer are formed by the same process.

10. The electronic device according to claim 1, wherein

the active element is a thin film transistor, and the optical sensor is a photodiode having a lateral structure.

11. The electronic device according to claim 1, further comprising

a control circuit that controls a display brightness in accordance with lightness information of ambient light detected by the optical sensor.