Display device, method of operation thereof, and method of manufacturing an optical sensing array therein

Abstract

The present invention provides a display device, an operating method thereof and a method of manufacturing an optical sensing array in the display device. The display device includes: a pixel array including a plurality of pixels, each pixel including a plurality of sub-pixels; a black matrix located between the sub-pixels; and an optical sensing array at the black matrix, the optical sensing array including row conductors and Column conductors cross row conductors at the intersection area.

Description

technical field [0001] Embodiments of the invention relate to an optical sensing array embedded in a display and a method for operating the optical sensing array. Background technique [0002] Display devices have become increasingly popular and widely used, such as in cellular telephones, computer monitors, televisions, tablets, and the like. These display devices may be any type of display including organic light emitting displays (OLEDs), liquid crystal displays (LCDs), and the like. In particular, display devices including optical sensors have been developed, for example, to sense user interaction with the display device (eg, interaction with the display device via the user's finger or via use of a stylus). , sensing ambient light, scanning documents, etc. [0003] In general, however, these embedded optical sensors are fabricated to be formed in the same active area as the display emissive elements (eg, at the pixels of the pixel area of ​​the display device). Thus, ...

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Problems solved by technology

[0004] In addition, conventional optical sensors are not wavelength-selective and thus react to other optical signals in addition to those from a specific source such as the sensed object of interest, such as included in noise corresponding to ambient light (i.e. , ambient light noise) in the optical signal

Thus, excessive signal processing and power are used to extract the signal of the sensed object of interest from ambient light noise

[0005] Moreover, when the address lines are shared by the optical sensor and the display element, the processes of reading the sensor and writing the display element cannot occur simultaneously, resulting in inefficient processing within the display device

Optionally, when the display device employs separate address control lines, mechanisms and signals for the optical sensor and the display element, the area of ​​the display surface allocated to the dual addressing function is increased, thus occupying additional active area from the display element

[0006] In addition, display devices employing conventional optical sensors may cause crosstalk between display emitting elements and optical sensors

That is, light from the display element can be undesirably sensed by the optical sensor, leading to incorrect optical readings and / or increased signal extraction of the sensed object of interest from ambient light noise or light emitted from the display element processing

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