Display device and electronic device
A display device and display surface technology, applied in static indicators, electrical digital data processing, instruments, etc., can solve the problems of complex circuit structure, difficult identification, light detection, etc., and achieve the effect of simplifying the circuit structure
Inactive Publication Date: 2008-09-17
SEIKO EPSON CORP
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[0008] However, according to the display devices disclosed in Patent Documents 1 and 2, there is a problem that the detection current flowing through the sensor is weak, and it is difficult to accurately detect a pointing mechanism such as a finger based on a change in the light intensity of external light irradiated on the display surface. s position
More specifically, when the surroundings of the pointing mechanism are relatively dark, that is, in an environment such as indoors where the light intensity of external light is low, the respective light intensities of the detection light reflected by the pointing mechanism and the external light are at the same level, making it difficult to recognize Detection light and external light reflected by the indicating mechanism
Therefore, by detecting external light with the sensor, the light corresponding to the image of the pointing mechanism that should be detected cannot be detected in a state of being distinguished from the outside light, and the position of the pointing mechanism cannot be determined with high accuracy.
[0009] Moreover, as shown in Patent Document 1, according to the technique of controlling the control signal for controlling the operation of the sensor, it is necessary to add a voltage level adjustment circuit or a timing adjustment circuit for adjusting the light detection time. The circuit configuration of the control circuit for control becomes complicated
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[0053] Hereinafter, various embodiments of a display device and an electronic device according to the present invention will be described with reference to the drawings.
[0054]
[0055]
[0056] First, refer to figure 1 and figure 2 , the overall configuration of the liquid crystal device 1 as one embodiment of the "display device" of the present invention will be described. figure 1 It is a plan view of the liquid crystal device 1 viewed from the opposite substrate side of the TFT array substrate and each component formed thereon, figure 2 yes figure 1 The II-II' section view. The liquid crystal device 1 of the present embodiment is driven by a TFT active matrix driving method with a built-in driver circuit.
[0057] figure 1 and figure 2 In the liquid crystal device 1 , a TFT array substrate 10 , which is an example of the “substrate” of the present invention, and a counter substrate 20 are arranged to face each other. A liquid crystal layer 50 is sealed betw...
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The invention supplies a display device. A sensor part (204) and a display part are integrated on the image display area (10a) on the TFT array substrate (10). A sensor control circuit part (201) controls the motion of the sensor part (204), and supplies the signals for changing the light intensity of the light source emitted from the backlight (206) to the backlight control circuit part (202). When detecting the indicating mechanism such as finger, the sensor control circuit part (201) processes the data of the image shot with the indicating mechanism, to determine the location of the indicating mechanism.
Description
technical field [0001] The present invention relates to the technical field of, for example, a display device such as a liquid crystal device having a touch panel function, and electronic equipment including such a display device. Background technique [0002] In a liquid crystal device as an example of such a display device, a display device having a so-called touch panel function has been proposed, in which photosensors are arranged in groups of a plurality of pixel units or an arbitrary number of pixel units. An image can be displayed based on the light transmitted through the pixel unit, and information can be input to the display device through the pointing mechanism. In such a display device, a light receiving element such as a photosensor detects that a pointing mechanism such as a finger or a pointing member touches or moves on the display surface of the liquid crystal device, thereby allowing information to be input to the display device. As light-receiving element...
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IPC IPC(8): G06F3/041G06F3/042G02F1/133
CPCG06F3/042G06F3/0412
Inventor 太田人嗣
Owner SEIKO EPSON CORP