Optical sensing device and display with optical sensing device

Abstract

The invention provides an optical sensing device, which comprises an optical sensing component, a storage capacitor, a first thin-film transistor and a second thin-film transistor. The optical sensing component can reset the voltage of a node as a first voltage level, and the storage capacitor is electrically connected with the node to discharge the node to a second voltage level within frame time according to the intensity of illumination of the optical sensing component. The second voltage level controls the conduction voltage of the first thin-film transistor, and the second thin-film transistor outputs a voltage to be read according to the conduction voltage.

Description

【Technical field】 [0001] The present invention relates to a light sensing device, in particular to a light sensing device capable of increasing the aperture ratio of a display; the present invention also relates to a display with the above light sensing device. 【Background technique】 [0002] With the vigorous development of technology, network, and communication, electronic products not only need to have the novelty of technology, but also seek direct interaction with users to meet the needs of users in terms of convenience and interactivity. Therefore, many touch-sensitive products and interfaces have been launched correspondingly, such as ATM cash machines, personal digital assistants (Personal Digital Assistant, PDA), mobile phones or notebook computers. The touch-sensitive products allow the user to approach or press the touch panel (touch panel) to directly interact between the user and the electronic product to complete data transmission, access and update, thus incre...

AI Technical Summary

Problems solved by technology

Because the prior art needs to add an additional control signal to the existing circuit of the pixel unit, the circuit structure is relatively complicated.

However, an overly complex circuit architecture will increase the difficulty of wiring thin film transistors and increase the cost

[0005] Furthermore, since the light sensing signal is usually quite weak, if an additional complex control circuit is added to obtain a stronger signal under the original circuit structure of the pixel unit, the aperture ratio of the display will be reduced.

Therefore, it is difficult to balance the optical signal strength and the complexity of the sensing device when designing the existing optical sensor embedded in the display.

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