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A display device and ambient light detection method thereof

A display device and ambient light technology, applied in photometry, identification devices, measurement devices, etc., can solve problems such as inaccurate measurement results

Active Publication Date: 2021-08-06
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem that the existing ambient light sensor is affected by the light emitted by the AMOLED panel, resulting in inaccurate measurement results, and provides a display device and an ambient light detection method thereof

Method used

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  • A display device and ambient light detection method thereof
  • A display device and ambient light detection method thereof
  • A display device and ambient light detection method thereof

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Experimental program
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Embodiment 1

[0032] This embodiment provides a display device, such as figure 1 As shown, it includes a display panel 1, a polarizer 2, a polarization adjustment component 3, and a photodetector 4: wherein, the polarizer 2 is arranged outside the light-emitting surface of the display panel 1, and is used for detecting The polarization of the ambient light of the display panel 1 is changed; the polarization adjustment component 3 includes a first state and a second state, and in the first state and the second state, the polarization adjustment component 3 passes through the polarizer 2 and the display The transmittance of the polarized ambient light incident behind the panel 1 is different; the light detector 4 is used to respectively detect the transmitted light intensity after passing through the first state and the second state, and calculate the transmittance of the ambient light according to the transmittance. light intensity.

[0033] In the display device of this embodiment, the lig...

Embodiment 2

[0035] This embodiment provides a display device, such as Figure 2-5 As shown, it includes a display panel 1, a polarizer, a polarization adjustment component, and a photodetector 4: wherein, the polarizer includes a first polarizer 21, which is arranged outside the light-emitting surface of the display panel 1 for Change the polarization of the ambient light that enters the display panel 1 through it; the polarization adjustment component includes a first state and a second state, and in the first state and the second state, the polarization adjustment component passes through the polarizer It is different from the transmittance of the polarized ambient light incident behind the display panel 1; the light detector 4 is used to respectively detect the transmitted light intensity after passing through the first state and the second state, and calculate the ambient light intensity according to the transmittance. The intensity of the light.

[0036] In this embodiment, the func...

Embodiment 3

[0054] This embodiment provides an ambient light detection method for the display device of the above embodiment, including the following detection steps:

[0055] S01. The polarizer changes the polarization of the ambient light incident on the panel; that is to say, the light from the ambient light that is polarized by the polarizer and directed to the polarization adjustment component contains polarized light, while the light of the display panel that is directed to the polarization adjustment component The light is unpolarized light. Wherein, when the polarizer is a polarizer, it can not only convert the light emitted by the ambient light to the display panel into polarized light, but also suppress the reflection of the ambient light by the display panel.

[0056] S02. Obtain the transmittance of the polarized ambient light incident after passing through the polarizer and the display panel in the first state and the second state of the polarization adjustment component resp...

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Abstract

The invention provides a display device and an ambient light detection method thereof, which belong to the field of display technology and can solve the problem that the existing ambient light sensor is affected by the light emitted by an AMOLED panel and causes inaccurate measurement results. In the display device of the present invention, the light from the ambient light that is polarized by the polarizer and directed to the polarization adjustment member contains polarized light, while the light from the display panel that is directed to the polarization adjustment member is non-polarized light. In the second state, the transmittance of the polarized light adjusting component to the polarized ambient light incident after passing through the polarizer and the display panel is different, while the unpolarized light emitted by the display panel remains unchanged, so different transmittances are detected The transmitted light intensity in the state can be used to calculate the light intensity of the ambient light originally directed to the display panel. In this display device, the influence of the display panel itself on the ambient light measurement is excluded, so the detection result is more accurate.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a display device and an ambient light detection method thereof. Background technique [0002] Currently, mainstream display devices are generally liquid crystal display panels (LCD, Liquid Crystal Display) or active organic electroluminescent display panels (AMOLED, Active-Matrix Organic Light Emitting Diode). Compared with liquid crystal display panels, AMOLED has the advantages of faster response speed, higher contrast ratio, wider viewing angle, lower power consumption, and smaller module thickness. Moreover, the use of AMOLED in wearable products can make it thinner and lighter in terms of shape and specifications. Therefore, more and more wearable products currently use AMOLED as display panels. [0003] The inventors have found at least the following problems in the prior art: In AMOLED wearable applications, an ambient light sensor for measuring ambient light...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09F9/33G01J1/42
CPCG01J1/4204G09F9/33
Inventor 单冬晓
Owner BOE TECH GRP CO LTD