DISPLAY PANEL HOUSING OPTICAL SENSORS (amended

• US 20110169771A1
• Filed: 07/09/2009
• Published: 07/14/2011
• Est. Priority Date: 09/19/2008
• Status: Abandoned Application

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Nakayama, Takahiro, Gotoh, Toshimitsu, Uehata, Masaki, Fujioka, Akizumi
• Application Number:
  US13/119,735
• Publication Number:
  US 20110169771A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G02F 1/13312 Circuits comprising photodetectors for purposes other than feedback
• CPC Class Codes: G02F 1/13318 Circuits comprising a photodetector
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/042 by opto-electronic means

Abstract

A display panel housing optical sensors has an active matrix substrate (100) having a pixel region (1) in which pixels are arranged in a matrix, and optical sensors (11) are formed in at least a portion of the pixel region (1). Included among the optical sensors (11) in the pixel region (1) are an image pick-up sensor (11a) that picks up an image of an object that has come close to the pixel region (1) and an environmental illuminance sensor (11b) that detects environmental illuminance, as optical sensors having mutually different characteristics. A signal processing circuit (8) performs processing on an output signal from the image pick-up sensor (11a) in accordance with the environmental illuminance detected by the environmental illuminance sensor (11b).

Claims

1. A display panel housing optical sensors that has an active matrix substrate having a pixel region in which pixels are arranged in a matrix, optical sensors being formed in at least a portion of the pixel region, the display panel housing optical sensors comprising:

optical sensors having mutually different sensitivity characteristics inside the pixel region; and

, furthermore,

a signal processing circuit that performs processing in accordance with respective output signals from the optical sensors.

2. The display panel housing optical sensors according to claim 1,

wherein included among the optical sensors are an image pick-up sensor that picks up an image of an object that has come close to the pixel region and an environmental illuminance sensor that detects environmental illuminance, and

the signal processing circuit performs processing on an output signal from the image pick-up sensor in accordance with the environmental illuminance detected by the environmental illuminance sensor.

3. The display panel housing optical sensors according to claim 1,

wherein the optical sensors each include a photodiode formed on the active matrix substrate, a capacitor connected to the photodiode, and a switching element that controls readout of charge accumulated in the capacitor,

the photodiode in the image pick-up sensor and the photodiode in the environmental illuminance sensor have substantially the same characteristics, and

capacitances of the capacitors are mutually different in the optical sensors having mutually different sensitivity characteristics.

4. The display panel housing optical sensors according to claim 1,

wherein the optical sensors each include a photodiode formed on the active matrix substrate, a capacitor connected to the photodiode, and a switching element that controls readout of charge accumulated in the capacitor,

the photodiode in the image pick-up sensor and the photodiode in the environmental illuminance sensor have substantially the same characteristics, and

the display panel housing optical sensors further comprises a light amount restriction member that restricts the amount of light that is incident on the environmental illuminance sensor, on a path of light that is incident on the environmental illuminance sensor.

5. The display panel housing optical sensors according to claim 4, wherein the light amount restriction member is a light-shielding film that covers a portion of a pixel in which the environmental illuminance sensor is provided.

6. The display panel housing optical sensors according to claim 4, wherein the light amount restriction member is a color filter that covers a portion of a pixel in which the environmental illuminance sensor is provided.

7. The display panel housing optical sensors according to claim 4, wherein the light amount restriction member is a neutral density film that covers the entirety of a pixel in which the environmental illuminance sensor is provided.

8. The display panel housing optical sensors according to claim 1, wherein the environmental illuminance sensor is provided in a dummy pixel region that does not contribute to display in the pixel region.

9. The display panel housing optical sensors according to claim 7, wherein the environmental illuminance sensor is provided in an effective pixel region that contributes to display in the pixel region.