JP2019045723A - Display device - Google Patents

Abstract

To provide a display device capable of reducing variation of brightness of a screen in each product.SOLUTION: A display 100 has a flexible wiring member 50. A circuit board 200 is fixed to the display 100, to which the flexible wiring member 50 is connected. A label 300 is pasted on the flexible wiring member 50 to display information on the display 100. Data on the display 100 is stored in a memory part. The circuit board 200 has a terminal part 250 for inputting data to the memory part. The label 300 is pasted on a position which can be visually recognized in a state in which the circuit board 200 is fixed to the display 100.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a display device including a light emitting element such as a light emitting diode.

  Conventionally, various liquid crystal display devices including a liquid crystal display panel have been proposed, and for example, disclosed in Patent Document 1. Such a liquid crystal display device has a backlight specification that illuminates a liquid crystal display panel with illumination light emitted from a light emitting element such as a light emitting diode. The screen of the liquid crystal display device becomes brighter or darker depending on the light emission luminance of the light emitting element.

JP 2007-292963 A

However, the light emitting diodes have variations in individual light emission luminance, and the brightness of the screen of the liquid crystal display device varies from product to product. For example, when 100 liquid crystal display devices (products) are manufactured, the brightness of the screen may be different for each of the 100 products.
The present invention provides a display device capable of reducing variations in screen brightness for each product.

The present invention includes a display unit 100, a circuit board 200 fixed to the display unit 100, a label 300 on which information about the display unit 100 is displayed, and a memory unit 230 in which data about the display unit 100 is stored. And comprising
The circuit board 200 has a terminal part 250 for inputting the data to the memory part 230, and the label 300 is attached to a position where the circuit board 200 can be visually recognized in a state where the circuit board 200 is fixed to the display unit 100. It is characterized by being.

  The present invention also includes a display device 100 having a flexible wiring member 50, a circuit board 200 fixed to the display device 100 and connected to the flexible wiring member 50, and the flexible wiring member. 50, a label 300 on which information on the display device 100 is displayed, and a memory unit 230 in which data on the display device 100 is stored, and the circuit board 200 stores the data on the memory unit 230 in the memory unit 230. While having the terminal part 250 which inputs data, the said label 300 is affixed on the position which can be visually recognized in the state in which the said circuit board 200 was fixed to the said indicator 100, It is characterized by the above-mentioned.

  Further, the present invention is characterized in that the display device 100 includes a liquid crystal display panel 10 and a light emitting element 30 that emits light for illuminating the liquid crystal display panel 10.

  In addition, the present invention is characterized in that the information displayed on the label 300 is a luminance rank of the light emitting element.

  In addition, the present invention is characterized in that the data stored in the memory unit 230 is luminance data of the light emitting element 30.

  In a state where the circuit board is fixed to the display device, data related to the display device can be input to the memory unit, and variations in screen brightness for each product can be reduced.

Sectional drawing which shows embodiment of this invention. The rear view which shows embodiment same as the above. The block diagram which shows the electric constitution of embodiment same as the above. The rear view which shows other embodiment of this invention.

  An embodiment in which the present invention is applied to a liquid crystal display device will be described below with reference to the accompanying drawings. The liquid crystal display device includes a liquid crystal display 100, a circuit board 200, and a label 300. The liquid crystal display 100 includes a liquid crystal display panel 10, a light guide plate 20, a light emitting element 30, a case body 40, a flexible wiring board 50, a bezel 60, and the like.

  The liquid crystal display panel 10 has a polarizing plate attached to both front and rear surfaces of a TFT type liquid crystal panel in which liquid crystal is sealed in a pair of glass substrates on which transparent electrodes are formed, and vehicle information such as vehicle speed and engine speed is stored. Displayed as an image. The liquid crystal display panel 10 is electrically connected to the circuit board 200 by a flexible wiring board 50. The flexible wiring board 50 is called an FPC (Flexible Printed Circuit).

  The light guide plate 20 is made of a translucent resin such as acrylic and has a flat plate shape. The light guide plate 20 is disposed on the rear surface side of the liquid crystal display panel 10. Optical sheets 21 such as a light diffusion sheet, a light reflection sheet, and a brightness enhancement film are disposed on the front and rear surfaces of the light guide plate 20. The light guide plate 20 is held by the case body 40 and is parallel to the liquid crystal display panel 10.

  The light emitting elements 30 are composed of a plurality of light emitting diodes, and are arranged in a row along the side end face 20 a of the light guide plate 20. The light emitting element 30 is mounted on the hard wiring board 31 and emits illumination light to the side end face 20 a of the light guide plate 20. The illumination light emitted from the light emitting element 30 is guided to the rear surface side of the liquid crystal display panel 10 by the light guide plate 20.

  The case body 40 is made of a metal such as stainless steel (SUS), and houses the light guide plate 20, the light emitting element 30, and the like. The case body 40 has a support portion 40 b that fixes the circuit board 200. One end 50 a of the flexible wiring board 50 is connected to the liquid crystal display panel 10, and the other end 50 b of the flexible wiring board 50 is connected to the connector 240 of the circuit board 200. The bezel 60 has a rectangular opening 60 a for visually recognizing the screen of the liquid crystal display panel 10, and holds the outer periphery of the liquid crystal display panel 10.

  The circuit board 200 is formed by forming a wiring pattern on a base material made of glass epoxy resin, and is fixed to the support portion 40b of the case body 40 by four screws V. A display controller 210 and a microcomputer 220 are mounted on the front surface of the circuit board 200. An EEPROM (Electrically Erasable Programmable Read Only Memory) 230 and a connector 240 are mounted on the rear surface of the circuit board 200.

  A check land 250 is formed on the rear surface of the circuit board 200, and luminance data of the light emitting element 30 is stored in the EEPROM 230 from the check land 250. As the luminance data stored in the EEPROM 230, drive voltage data applied to the light emitting element 30 and PWM (Pulse Width Modulation) data can be considered.

  The label 300 is an adhesive sheet on which a QR code (registered trademark) is printed, and is attached to the flexible wiring board 50. Information relating to the luminance rank of the light emitting element 30 is stored in the QR code of the label 300. The label 300 is affixed at a position that is visible from the rear side of the liquid crystal display device.

  FIG. 3 is a block diagram showing an electrical configuration of the liquid crystal display device. The microcomputer 220 includes a CPU 221, a nonvolatile memory 222, and a volatile memory 223, and is mounted on the circuit board 200. The non-volatile memory 222 is made of, for example, a flash memory, and the volatile memory 223 is made of, for example, an SDRAM (Synchronous Dynamic Random Access Memory).

  The speed sensor 400 detects the vehicle speed and outputs speed data to the microcomputer 220. The rotation sensor 500 detects the rotation speed of the engine and outputs rotation speed data to the microcomputer 220. The microcomputer 220 controls the display controller 210 and drives the light emitting element 30 based on a predetermined program stored in the nonvolatile memory 222. The display controller 210 displays an image on the liquid crystal display panel 10 based on the control signal output from the microcomputer 220.

  According to the present embodiment, with the circuit board 200 fixed to the display device 100, the QR code of the label 300 can be scanned, and luminance data corresponding to the luminance rank of the light emitting element 30 can be input to the EEPROM 230. By making the light emission luminance of the element 30 constant, it is possible to reduce luminance variations among products.

  In addition, this embodiment is not limited to this embodiment, A various deformation | transformation is possible. For example, the label 300 may be attached to the case body 40 as in another embodiment shown in FIG. In this embodiment, the luminance data of the light emitting element 30 is stored from the check land 250 to the EEPROM 230. For example, the light emitting element 30 is connected to the EEPROM 230 via a connector to which a CAN (Controller Area Network) is connected. Brightness data may be stored.

100 Liquid crystal display (display)
DESCRIPTION OF SYMBOLS 10 Liquid crystal display panel 30 Light emitting element 50 Flexible wiring board (flexible wiring member)
200 Circuit board 230 EEPROM (memory part)
250 Checkland (terminal part)
300 labels

Claims (5)

A display, a circuit board fixed to the display, a label on which information on the display is displayed, and a memory unit in which data on the display is stored,
The circuit board has a terminal part for inputting the data to the memory part, and the label is attached to a position where the circuit board can be visually recognized in a state where the circuit board is fixed to the display. Display device. A display device having a flexible wiring member, a circuit board fixed to the display device and connected to the flexible wiring member, and information relating to the display device attached to the flexible wiring member is displayed. A label and a memory unit in which data relating to the display is stored,
The circuit board has a terminal part for inputting the data to the memory part, and the label is attached to a position where the circuit board can be visually recognized in a state where the circuit board is fixed to the display. Display device.   The display device according to claim 1, wherein the display device includes a liquid crystal display panel and a light emitting element that emits light that illuminates the liquid crystal display panel.   The display device according to claim 3, wherein the information displayed on the label is a luminance rank of the light emitting element.   The display device according to claim 3, wherein the data stored in the memory unit is luminance data of the light emitting element.

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