IEC TR 62595-1-5:2022

Display lighting unit - Part 1-5: Electrical signal interface of LED BLU

IEC TR 62595-1-5:2022(E), which is a Technical Report, provides information for the future standardization of the electrical signal interface of LED backlight units for liquid crystal display television sets, which include control signals, control data and LED driver interface. This document only provides information about 2-D local dimming LED backlight units, with or without local boosting.
NOTE All values and parameters of this document are examples.

General Information

• Status: Published
• Publication Date: 13-Dec-2022
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• ICS: 31.120 - Electronic display devices
• ICS: 31.260 - Optoelectronics. Laser equipment
• Technical Committee: TC 110 - Electronic displays
• Drafting Committee: WG 19 - TC 110/WG 19
• Current Stage: PPUB - Publication issued
• Start Date: 19-Jan-2023
• Completion Date: 14-Dec-2022

Standards Content (Sample)

IEC TR 62595-1-5
®

Edition 1.0 2022-12
TECHNICAL
REPORT

colour
inside


Display lighting unit –
Part 1-5: Electrical signal interface of LED BLU
IEC TR 62595-1-5:2022-12(en)

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IEC TR 62595-1-5

®


Edition 1.0 2022-12




TECHNICAL



REPORT








colour

inside










Display lighting unit –

Part 1-5: Electrical signal interface of LED BLU


























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ICS 31.120; 31.260 ISBN 978-2-8322-6269-6



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– 2 – IEC 62595-1-5:2022  IEC 2022
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 7
4 Electrical interfaces configuration . 7
4.1 General . 7
4.2 Basic configuration of LED blocks . 8
4.3 Overview of interface function . 9
5 Electrical characteristics and interface definition . 10
5.1 General . 10
5.2 Local dimming and boosting data interface . 10
5.2.1 General . 10
5.2.2 Pin configuration and electrical characteristics . 10
5.2.3 Local dimming and boosting data format . 10
5.2.4 Local dimming and boosting data signal timing . 11
5.3 Local dimming and boosting control signal interface . 12
5.3.1 General . 12
2
5.3.2 I C command format . 12
2
5.3.3 I C slave address . 12
2
5.3.4 I C register address . 12
5.4 Interface between LED BLU and the LED driver unit . 13
5.4.1 General . 13
5.4.2 Static mode . 13
5.4.3 Common cathode mode . 14
5.4.4 Common anode mode . 14
6 Future standardization . 14
6.1 General . 14
6.2 Configuration of LED matrix or LED strings . 15
6.3 Mini-LED BLU . 15
Bibliography . 16

Figure 1 – LCD-TV interface signal flow chart . 8
Figure 2 – Example of the effect on luminance of LED BLU with local boosting . 10
Figure 3 – Local dimming and boosting data format . 10
Figure 4 – Local dimming and boosting data signal timing . 11
2
Figure 5 – I C command format . 12
Figure 6 – Example of static mode LED backlight. 13
Figure 7 – Example of common cathode mode LED backlight . 14
Figure 8 – Example of common anode mode LED backlight . 14

Table 1 – Address map of the normal mode LED blocks (N rows, M columns) . 8
Table 2 – Address map of the reverse mode LED blocks (N rows, M columns) . 9

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IEC 62595-1-5:2022  IEC 2022 – 3 –
Table 3 – Interface function . 9
Table 4 – Pin configuration and electrical characteristics . 10
Table 5 – Local dimming and boosting data signal timing . 11
2
Table 6 – I C slave address . 12
2
Table 7 – I C register address . 13

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– 4 – IEC 62595-1-5:2022  IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

DISPLAY LIGHTING UNIT –

Part 1-5: Electrical signal interface of LED BLU

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
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9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC TR 62595-1-5 has been prepared by IEC technical committee 110: Electronic displays. It
is a Technical Report.
The text of this Technical Report is based on the following documents:
Draft Report on voting
110/1445/DTR 110/1465A/RVDTR

Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Technical Report is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.

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IEC 62595-1-5:2022  IEC 2022 – 5 –
A list of all parts in the IEC 62595 series, published under the general title Display lighting unit,
can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.

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– 6 – IEC 62595-1-5:2022  IEC 2022
DISPLAY LIGHTING UNIT –

Part 1-5: Electrical signal interface of LED BLU



1 Scope
This part of IEC 62595, which is a Technical Report, provides information for the future
standardization of the electrical signal interface of LED backlight units for liquid crystal display
television sets, which include control signals, control data and LED driver interface. This
document only provides information about 2-D local dimming LED backlight units, with or
without local boosting.
NOTE All values and parameters of this document are examples.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 62595-1-2:2016, Display lighting unit – Part 1-2: Terminology and letter symbols
3 Terms, definitions, and abbreviated terms
For the purposes of this document, the terms and definitions given in IEC 62595-1-2 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 Terms and definitions
3.1.1
local dimming
manipulation of luminance over an area of a two-dimensionally divided backlight unit in
response to the image that is going to be displayed on the LC device at the same area
Note 1 to entry: In this document, "local dimming" refers to 2-D dimming.
[SOURCE: IEC 62595-1-2:2016,3.7.4, modified – in the terms “block dimming, two-dimensional
dimming and 2-D dimming” have been removed, the term “(spatially)” has been deleted in the
definition and Note 1 to entry has b
...